Performance Bicycle is a national chain - and their inventory selections tend to reflect that. It's kindof like going to Home Depot over ACE Hardware (which I do all the time out of convenience - but often not happy that I did!).
They are always helpful to point you in the direction of something you might be looking for, and if you know exactly what you want or need, and they have it, they're a great match! If you're looking for more innovative or specific products they don't seem to be as good of a choice for me (much of their inventory are private label brands of their own - I've questioned the quality of some of these at times). I tend to start with their website, see if I can find what I'm looking for, then call the store to see if it's in stock.
Definitely an okay bike shop, with knowledgeable personnel, and an excellent choice for someone new into cycling, or looking for family bikes and basic accessories. I can't disagree with the other reviews at all - just tend to be looking for something a bit more innovative in my favorite bike shops (mostly having to shop online these days for most of this!).