Used them once in 2007 out of the Occidental Grande. We wanted to do a night dive down there since we were tired of the same ol' Paradise Reef night dive that most ops choose for their night dives. We dove La Francesca which was a pleasant change-up and very worth the drive down. However, we didn't like the op too much. Very much the cattle boat. They didn't know us so they stuck us with newbies whom kicked the hell out of us the whole dive. Every time we stopped to try to photograph something, they would basically bull rush us and destroy the shot so they could see what we were shooting. The DM could do very little I suppose. But the thing that was even tougher to swallow was the 35 minute max bottom time. We literally came up with half a tank after being kicked for a half hour. Perhaps they had to for the newbies but I doubt it, they just wanted the dive to be over. Probably a scheduling issue as others have mentioned. To be fair, their DM briefing was very professional and safety oriented. It just ended up being a frustrating dive.
Just thought I'd tell my story as you need to watch out for that short bottom time enforcement with these guys as well as the cattle boat setting. Frustrating experience and I'd almost certainly not use them again.