Edit--
I'm now not sure if this is the linear type machine or not - so very much contradictory information out there! I guess (as far as my current level of understanding goes), this machine does half the motion of some that people claim to be best - that is it pivots, but does not additionally vibrate. So if I were to buy one again, I'd find one that pivots AND vibrates. These cheap China-Vibe units don't have much in the way of documentation on these listing pages, so it seems hit and miss!
Also, I'm starting to think that my regimen of 40-60 minutes per day needs to be cut back to 20 minutes twice a day or even less to play it safe, and maybe a longer session is OK if I rest for two days. You can really kick your a$$ on this machine without even breaking a sweat.
But I can tell you, in all my life, I've never been cut. This machine (and similar ones no doubt) has cut my muscles. It's weird to look like a fitness goddess while being a life-long couch potato all my life (I hike with poles too which is the other 1/2 my workout so don't get me wrong here).
Lastly, who knows how long this unit will last? If it lasts a year, it will be worth it. But If I ever get a straight answer from someone who: 1) isn't a contributing member of the peanut gallery, and 2) someone who isn't a dealer for a competing product, I'd probably buy another machine - one that vibrates as well as pivot.
End edit--
I ordered this primarily for my mom, but I wanted to use it too. She's used it a grand total of one time, but I on the other hand, have really taken a liking to this whole body vibration thing. I use it practically every single day for 40-60 minutes per session.
But as the other reviewers have stated, this is a linear-type machine, so it's very high impact. If I'd have know more about this, I would have bought the type that moves in 3 dimensions as well as pivots. There was one sold here (that seems to be gone now), that one reviewer stated it was such a mechanism, but there was scant info about it - that I didn't want to plunk down 3 more bills for another machine I'd need to replace.
Lastly, I got this unit with the hand rails for my mom's stability, but since she never uses it, I took them off altogether and just have the control mechanism sitting on a TV tray near the unit. I can get a much better range of positions by taking off those worthless rails. I might upload a pic of what that looks like.