So many people using this stand do so in bed. While I can see the utility of the product for this use and for those who disabilities, I also see the downside that has been reported: you shift in bed, the laptop slides off, and you get an Excedrin headache or a chipped tooth.

But I didn't buy this product to lay down - I bought it so I could stand while doing my work or surfing the web. I already have an adjustable height desk at my office, and this gives me a simple and portable solution at home. I've been seeing more and more health studies decrying the amount of time people spend sitting as being very unhealthy. I even saw someone go so far far as to call sitting the new smoking. I know that I am more alert and more productive when I spend a significant portion of my day standing. But enough about the politics of standing versus sitting.

For standing while on your laptop, this is a use where this product really shines. It's lightweight and collapses completely when not in use. You can adjust it to a variety of heights. There's a compass-degree guide on the hinges to make it easier to align the left and right hinges to the same angles. (Without the guides, it would be very difficult to figure out the angles. I struggled with this until I realized the utility of the compass numbers on the hinges. Just look at the setting on one side - say, 75 degrees - and match it on the other side.

I would think this product could be readily adjusted to sit on a table or desk and provide the right height for anyone to stand who is 4'10" to about 6'4". The product works well to vent the heat created by my laptop.

I find the stand particularly well-suited for standing while on your computer and recommend it highly for this purpose.

I spent HOURS looking for a laptop stand (work from home & just needed something to use when I didn't feel like sitting at my desk or needed a change of scenery). I ordered 3 different kinds - Lapinator Plus! (WAY overpriced & too small, I returned) and Myplace Laptop Table Workstation (which I also kept). I loved the fact this has so many angles/options, came assembled & is intuitive to figure out (not only how to use but how to adjust height/angle, etc). It's exactly as described, feels very sturdy & high-quality, and gives me a lot of options. Worth the price & highly recommended.

I'm using it everyday and really love it.

This product does help a lot when I want to use my laptop on my bed. This kind of table is far better than a regular bed tray since it is angle adjustable and gives more space to my legs. Also, the aluminum alloy panel helps prevent the computer from getting too hot. There is space for the mouse too.

I recommend using it on bed or sofa, rather than putting it on the floor since increase in height may result in a little swaying. It's not difficult to unfold the desk, but may need some patience loosing and locking the buttons. It is not that easy to change the height, so keeping it in one place may be a good idea.

I had been looking for a laptop desk/table/tray like this for some time; at one point, before discovering this product, I had seriously considered designing and constructing my own. Fortunately I found this first, because it is, in all respects, nearly identical to what I had in mind. I did not, however, purchase the product immediately upon finding it, largely in part due to the poor reviews by some people regarding the joints/buttons. I cannot speak for them, and it's entirely possible that early models had a manufacturing problem, but I can say that's not the case anymore. That being said, here is my review:

Basic Overview
First off, I will only recommend this particular model, I know there are others, so don't take my review and think that it will apply to those models, because it might not.

This model is made out of very sturdy aluminum and is brushed silver; looks very nice and techie (for those of you that care about looks)
The overall weight of the product is very light, so it is easy to push around, pick-up, etc.
The joints are solid black plastic with aluminum buttons; there are three joints (adjustments points) on each side that gives you a wide range of settings/setup
The buttons can be difficult to press, because both the spring and the locks must be strong enough to not only support the weight of your laptop, but you banging on it. So to make adjustments, it does take a good bit of strength to depress the button; and from my personal experience, it should only be done without the laptop sitting on it. There have been a couple times when I went to adjust the tray and the buttons did not depress, but simply applying some pressure on the leg while pushing in the button resolved that; not unlike having to turn a cap on a bottle backwards to get the threads to line up.
The tray on this model is vented and has two fans with a single USB plug on it. The fans are silent and do a good job of keeping the laptop cool. The tray itself never seems to even get warm.
At the front of the tray, there are two plastic clips that are locked into a slot on the front, allowing them to slide left/right. These clips are intended to help hold the laptop from sliding off when the tray is placed at steep inclines. While they do a moderately good job of this, they're better suited for slim line laptops like the Mac Book Air thing. If you own a real laptop and not a toy, you're going to find these clips will be unable to hold your laptop in place if you intend to have the tray at nearly upright positions like they show in some of the product pictures. A better solution, IMHO, for that would be to purchase some Velcro dots that you put on both the bottom of your laptop and on the tray to keep it in position, but this is not something that I have had to do myself, since I do not use the tray at those kinds of inclined positions.

A bit of a side note in all this:
I have lower back problems, what does that have to do with anything? Everything, for the first time I can lay on the floor when my back hurts with this tray positioned so that I can actually do work and feel like I'm being productive, instead of just laying on the floor like like a lump of useless flesh. This was one of my goals with getting something like this, and it works perfectly for just this kind of situation.

Some possible cons and nitpicking
1. The instructions aren't great, and it took me a bit to figure out how to get the legs/tray oriented, but once you spend some time with it, you'll most likely figure out a couple positions that work for you, and you'll never need that page again
2. If you are heavy, large, big boned, over weight, an NFL line backer, Professional Body Builder or Shaquille o'Neal, this tray probably isn't going to be wide enough for you. If the manufacture were smart, they'd make a larger size for larger people.
3. If you have arthritis or are in your older (aka golden years) and lack hand strength, you may find making adjustments to this tray impossible; that maybe a deal killer for some of you out there, so I thought I should mention it.
4. The surface of the tray is rather smooth, and while it has the aforementioned clips on the front to help keep the laptop in place, it's not going to help much if you intend to use the tray at steep inclines. I don't believe this is a deal killer, it just might require some invention on your part to figure out how best to keep your laptop affixed to the tray (see my previous remarks about Velcro)

Recommendations for the manufacture:
1. The price is to high for most people. I'd really like to see this around the $30-40 price point, I think you'd get far better market penetration if you lowered the price. If someone is trying to determine if they should try/buy your product unseen, like many do here on Amazon, the current price point can be a deal breaker.
2. You all need to get with Dell and/or Apple, personally I'd try Dell, and get them to resell your product. It's good enough and there's nothing else like it on the market.

TL;DR: I recommend this laptop tray to anyone that's been looking for a solid, adjustable tray that can be used just about any place. While the entry price is steep, if you can wing it, it's worth it and there's nothing else on the market currently like it; at least nothing I have personally seen or can recommend at this time.