I try to avoid Performance... but, I do go to them for the following:
-Nutrition products (gels in mass quantities, Cliff Blocks, whatever)
-Tubes (Michelin Ultra-Light with the extra long French-style Presta stem - can't beat the price)
-Tacx bottle cage(s) (used for gift-builds for friends)
-E3 Form Saddle (great saddle, great price, used for the 'beater bike')