I bought them (not from amazon, but they're the same product, and yes I'm certain they aren't counterfeit), and they arrived fine, and were a lot of fun. Sadly, the very same day one of the ear motors broke - the left ear started making horrible clacking noises and refused to work properly. Shame.
I'm not saying that you WILL have the same experience, but do know that there is a chance. After some googling, I discovered that I'm not the only one with this problem.
So if you're not well-off and plan to save up money especially for this, do know that the possibility of them breaking without you doing much exists and maybe reconsider your purchase and wait a couple of years for neurowear to release an updated version to spare yourself sour feelings. And if you do buy them, be VERY careful with them and make sure to read the little leaflet with warnings BEFORE turning them on.
Besides fragility there are a couple of other things that may possibly bug you:
- The battery box doesn't have a counterweight, so they tend to shift to the left side of your head a little. Not a lot, just a little.
- It's made for small heads, so it may not fit you well if you are a tall person or just have a large head.
- If you don't want the headset to be very noticable, you'll need to have thick, voluminous hair and bangs, though even if you have all that, there's not much that can be done to conceal the battery box.
- Taking them outdoors is okay only if you live in a room-temperature area without excessive humidity.
Lastly, know that it isn't some kind of a miraculous future device and it won't read your emotions with bulletproof accuracy. It's a fun toy and you should treat it as such, else you will be disappointed.
If your necomimi do break, though, don't be shy and make sure to contact neurowear about it. Their customer service is very supportive and if possible they will send you a replacement in a timely fashion.