Had one for a couple years. Very, very quiet (on par with the AquaClear 500 I used to run on my big tank). All the pluses that TTA mentioned. The Micron filter is reusable, too (immerse overnight in a 25% household bleach/water solution). I keep two Micron cartridges handy; one for the filter, one cleaned and ready to go for a swap.
Great product, I have the Bio-Wheel on mine.
v/r, N-A