Has anyone tried these aftermarket spoilers?

Any complaints or input on what people think about getting one of these. I notice that they mention drilling into the trunk?

http://cgi.ebay.com/ebaymotors/Cadillac-CTS-Spoiler-Wing-Painted-03-04-05-2006-2007_W0QQitemZ110300302705QQcmdZViewItemQQptZMotor s_Car_Truck_Parts_Accessories?hash=item19ae690d71&_trksid=p4506.c0.m245


http://cgi.ebay.com/ebaymotors/CADILLAC-CTS-Spoiler-Wing-UnPainted-2003-2004-2005-2007_W0QQitemZ260423462340QQcmdZViewItemQQptZMotor s_Car_Truck_Parts_Accessories?hash=item3ca272adc4&_trksid=p4506.m20.l1116