IME you can come away with some great stuff at GC if:
- you know exactly what you're looking at
- you know exactly what you're looking for
- you know exactly how much to pay (do your homework before you visit)
- you avoid stores in major metropolitan/upscale suburban areas
- you keep conversation with sales staff to an absolute minimum
- you avoid weekends/coupon days (FYI you can get the same deals within a day or two after, with a manager's approval)
- you're prepared to walk out with your self-respect and finances intact
The rest of the time it's a crap shoot...