i've got one of those installed right now. they are alright, but a little awkward in a mid sized case. it would be nice if i were able to aim it at my ram, but 1) it would block some of the airflow from the front intake and, 2) it comes with a plastic piece that gets plugged into one of your pci/isa slots to support it, cause they're kinda long when extended. you may be able to get away without using the support, but i havent tried yet.
(why cant i point it at the ram? vid card is in top slot, i could put it in above but the support wont go into that short little slot without trimming the plastic some.)
a couple other things. the fans on them arent all that great. one of them on mine has a habit of sputtering (kinda starting, then stopping) it it isnt tilted at just the right angle. and be sure to check the desc. to see if you are getting the intake or the blower (i noticed that that pages doesnt say), you can turn the fans around on them, but you'll need different screws then the ones that come with it. or just tape the fans on like i did.