That bloke is mostly talking garbage. I think it's very well built. I had no problem installing mine, didn't break anything and it really is the most comfortable headstrap because every other strap will hurt your face after a while.
The battery is fine, it gives quite a lot of extra play time while keeping the quest battery at 100% or close to it depending on the app or game being played. Mine doesn't make any noise either. I didn't have much issue with feeding the little velcro strap through and in fact I've since released it and let it hang over the top, (it's only about an inch long) because it's less restricting without it.
It's common knowledge that it's less suitable for action games because of the wobble and that's about the only negative worth considering.
In my opinion, for playing games like Red Matter, Moss, or any non action game, this is the best strap to use because it can be worn for hours and you don't really want to be wearing any other strap that squashes your face. There's a reason why the BoboVR is popular and hyped. It's not for everyone but it's a damn good headstrap.