I have two in my 300 gallon tank. Will probably add two more as I get more corals. I like that there is no power cord in the tank, relatively small, no heat in the tank, good flow, quiet, they can slip if bumped, but that is not a big concern. I like having adjustable flow also, I turn down the gph when feeding, put it back up when done.
Cant comment on the wavemaker as I dont have one, but I can say the customer service was great. Had one pump malfunction, returned it to Icecap and they fixed it and sent it back pretty quickly...
I got mine from Marinedepot.com