Well, it handled everything except a ROLLING boil, and I mean rolling. Much harder boil then what I would brew with for 60 minutes. It lost prime once, and I'm not sure what everyone gets upset about, I just turned the pump off, and disconnected the hose and lowered it till it filled my Pyrex cup, then reconnected, turned the boil down to typical brew day boil and that sucker worked just fine.
Again this is with the pump mounted horizontally, with 2 street elbows attached so the hose go up without bending.
Sounded like I killed a cat when it lost prime though.