"This is the only filter I have used so far, so I do not have much to compare to but I am very happy with it's performance thus far.
It is small, attractive, and unobstrusive and can be very quiet. Does a good job in keeping my 2.5 gallon divided aquarium clean. The adjustable flow could have been a little more adjustable (my betta in the half of the tank with the filter thought it was a little too fast) but the natural slowing that happens for filters and plants fixed that problem. Still, I would say that this filter is a bit too fast for a 1 gallon betta bowl.
The filter impeller can be very quiet, but occasionally will develop an irritating rattle. Power cycling the filter several times cleared that problem up. This only seems to develop though if the filter is left off for a short length of time.
Cycling was accomplished without a hitch and I haven't seen any spikes in ammonia when I've changed one of the filter pads. A definite plus. =)
All in all, a cute little filter that actually does what it's supposed to do! I would definitely recommend it."