At SFO they're terrible. Last few flights I've waited 30-50 minutes, with Priority tags.

They also damaged my bag back in December. I filed a claim, and they made me bring it back to the airport (despite having already looked at it after the initial damage) to determine whether they'd repair it or replace it. I left it with them at SFO for repair. Now they appear to have lost it, or at least that's my best guess. The last time I heard from them it was somehow in DEN, and the agent that called me from there still hasn't returned my calls despite leaving several voicemails for him.