Those things are pretty big output for their size, I have some friends that have them and they work great. The only thing is remembering to drain the condensate tank and insulating the discharge tube so you don't radiate any more heat back into the area your cooling. If you have a metal door garage, I used 3/4" styrofoam with the radiant barrier and cut it to fit the panels. Then make something to seal off the rest of the gap under the door.

Jeff