Honestly, I think PB is one of the better ACs out there.
To be honest, I've never seen an AC where...
- you can [url=http://i26.tinypic.com/fxcsis.png:1a6qsys9]submit cheats to them...and they actually respond back with thanks.[/url:1a6qsys9](meaning that they actually KNOW the cheat exists and they're trying to make it detected, rather than making a guessing game on whether they know or not.)
- there's alot of 3rd party Anti Cheat Organizations that take an AC to the next level (i.e: PBBans, PunksBusted, AON, etc.)