SO glad I purchased this!
As a former water ‘junkie’,  I lost the love of it after going through chemotherapy.  It’s been a challenge to stay hydrated.  I also just “forget,” also thanks to Chemo.  I started looking at “smart” water bottles, but didn’t like the idea of being stuck with one water bottle, or the expense.  I saw this and debated based on some reviews.  But, decided the price was worth a shot.  After just a few weeks, my water intake has increased by a good 39-40 ounces a day!!  I wouldn’t hesitate to buy another one (especially for the price).  The alerts are subtle, but definitely enough to catch my eye!  I thought they were going to be every hour, but it seems to be more frequent, which is fine.  It doesn’t light up at night as described, which is another plus!  It truly does fit over any size bottle!  I’m giving it 5 stars because it has done what I hoped!!  (To be 100% honest, the one thing to be aware of and the one thing that I’d suggest or upgrade if I could, is that the sensor has fallen off twice (in 2-3 weeks).  The first time was putting in it a car liquid carrier and though it was above the carrier, I somehow knocked it off putting it in or removing it.  One other time it was in my bag.  Good news is I found it and will be aware.  But I would love to find a way to secure it to the band or have an additional band over the top of it.  Again, personally, I’d buy it again.  It really depends on what you’re looking for.
Rating: 5 stars