Light is fine. LED construction quality is fine. Power supply is fine.
Glue is terrible. Post-it note has more adhesive. And the worst part is that it doesn't hold for long. As a result, after a few days, you have to search for double-sided tape and improvise constructions to keep it in place. I bought 2. One broke after 1 week, the other after 2. With 15 euros, I have bought similar, much nicer ones from a well-known chain of electrical goods and they have stayed in place for 3 months now.

It went under kitchen shelves. Its lighting is not powerful, it gets the job done but you would like something more. The main reason I bought it is because it is waterproof. However, I recommend buying a stronger IP20 (and cheaper) and putting it on a track, which will be more cost-effective for you.