I have this antenna in my attic as I didn't want to fool around with a mast, grounding, etc., etc., outside. Even at that, it improved my reception here in Reno quite a bit. My only gripe is that it also increased my interference from nearby FM broadcast towers a lot. I've ordered a couple of filters from Universal Radio that should fix that problem.
My scanners are a RaidoShack PRO-2052 and an old Uniden Bearcat BC175XL I bought for a few bucks off of eBay. I use the Bearcat for my LiveATC feed for Reno.
p.s. I should add that I live about ten miles from KRNO and I do pick up ATC and aircraft most of the time. I agree with some of the other posts, too, in that this antenna isn't the perfect fit for the aircraft band. Considering the price, though, it's a decent option if you're an antenna idiot like me.