I have a Seymour Duncan SSL-1 installed as the bridge pickup on one of my guitars, which is fairly similar to the FS-1. David Gilmour used the FS-1 first, around the time of The Wall, then switched to Seymour Duncan. I don't think they're sonically that different, but they're both very hot. They drive a dirt pedal or overdriven amp very well. A lot harder then the average Strat pickup, probably a little less bright then usual but still retain enough of that single coil brightness in comparison to a humbucker. You will experience a little less volume when switching from the bridge setting to the other combinations so it probably doesn't hurt to compensate a little by installing middle and neck pickups which are a little hotter as well.