They are no worse than any other handling agency around, can think of a lot worse handling agents than AC. I know a couple of people who work for them on the east coast and have no issues. They were being paid around $18 per hour last time I heard. FYI, Oceania Aviation pay $19 an hour & $21 on weekends.
The worst agent i know of pays $13 whislt on 3 months probation, then get $16 per hour!