Got mine today and so far as it is going thru it's paces in my utility sink to rinse off over night prior to a nice vinegar bath, I am totally impressed! These are smaller than my koralia nano's and are not any louder but more than twice as powerful! (it made a little noise at first when mounted to the side of the sink but not when holding it in the water, after a few hours now it is quiet even mounted on the sink)
The W1 wave setting had my utility sink swaying back and forth. I think I'll not be using that setting in my very old display tank for fear of something failing, glass, stand, who knows.......
W2, W3 and Else mode seem good and don't create waves or rocking but good varied flow. It also does not seem to be blowing water out any harder than my koralia nano 425 even though it is easily moving much more water.
Can't wait to put it in my tank this weekend!