love it!
Effective, traps moisture which helps relieve eye dryness and discomfort due to Bell's Palsy.  I would've given it a 5 but the strap rolls down over my other eye.  I replaced the round strap on my first moisture chamber with a flat strap, I'll do that to this one next (it's my spare).  Great device and a professional looking presentation.
Rating: 4 stars