so far the only problem that i have with my mag3 is that is makes a little bit of noise. inside my stand that isnt really a problem because i close it all up and no more noise, i just dont like the idea of it. for my 20 gallon long the two outlets are plenty. plus i have another full open mag 3 on my return from sump, you can see it in one of the pics above. matter of fact, im getting too much flow on one side...the arrangement of my live rock causes the stream to blast my sand and kick it up a bit.
thanks for the heads up jason, why did you hate it??