Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Works great
Review: I have a few of these (small and medium) and they work great. This one (the small size) however doesn't do so well on my 29 gallon tank (but on the package states it's for up to 30 gal...). I would recommend the medium one for that size tank (thicker glass, I assume)
