I've had a number of PAF's and PAF-ish PU's over the years, and '57's stand out as the worst sounding of all of them. One set came in a guitar, they were purchased and installed aftermarket and the seller actually apologized for how bad they sounded. Poor guy paid thru the nose for them. He was right, they sounded awful: dull ribbony high-end and an overall muddiness. But if Gibson's changing specs on them periodically, it's hard to say what version you have. Considering their retail price, there are many better PU's that could be had at that price or less. Add in the bizarre 498T/490R set and the lackluster 490 set, and you can see why companies like Duncan & DiMarzio stay in business. To me, BB's sound much better, although I was disappointed to recently find out that their coil imbalance is so slight as to fall within the tolerance of balanced coil PU's. Gibson certainly doesn't have the passion for PU's that Seymour does.