Anyone tried this antenna yet?

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2452376804

I'm looking to replace the stock one and there are WAY too many available. I'm concerned that reception will go from bad to worse. I believe the crap reception is from the enthusiast radio. Will be yanking the radio out eventually but don't want to get stuck with 10 antennas. I've searched and read mixed responses. Please post your choices. Thanks.