I own one, and the results have been terrific, both with my Sanyo ST-35 and my current Pioneer TX-8500II. I used it inside and got acceptable results until I could move it out to a 7 foot fence post right outside the window. It now pegs the signal strength meter on all the local stations below 92 mhz. I haven't tried a standard whip, but the 2G-C is pretty clearly more sensitive in the "college band" than outside of it.
I thought about climbing up and mounting mine at the peak of the roof, but I'm getting such good reception from the fence post that I don't really feel the need. YMMV.
Well worth the $100.
David