I personally had no issues when one of their insured drivers hit my car. I waited for the police report, which clearly stated the other driver was at fault, and I was promptly paid by them for the damage to my vehicle. I didn't have to file anything through my insurance and they were very easy going about the whole thing.
Previously I had an M3 that had the bumper ripped off while parked and they had it taken care of fast, even going after the repair shop for non oem parts under the bumper.
I guess it's a really mixed bag with them over the past few years they've been expanding.