I've played several Slayers in PFS and otherwise now. I'd be lying if I said this wasn't my current favourite class in the entirety of Pathfinder. It's certainly going to be the most skill-monkey-ish of the full BAB classes, moreso than the Ranger, thanks to its access to Trapfinding via Slayer Talents.
In terms of damage, it may fall only ever slightly behind the Ranger, but that's not a bad thing for the flexibility you get in return. Rangers who lack the levels to access Instant Enemy suffer in DPR when they don't face their favored enemies; Slayers can overtake them in certain situations thanks to Studied Target and Sneak Attack. Above all else, it's the full BAB that's the real kicker.
I've built Slayers as heavily-armored "Fighters", dedicated archers and marksmen, full-blown skill-monkeys and traditional backstabbing scoundrels; it's just such a wonderfully flexible mundane class that, for a non-spellcaster, doesn't punish or pidgeonhole you too much.
My personal favourite build, though, has been the Switch Hitting Slayer; borrowed heavily from the Switch Hitting Ranger. Like the ranger variant, you use your Slayer Talents to take the Archery Combat Style and put your regular feats into melee feats.
Just, bravo, Paizo. Bravo.