We just dove Dos Ojos last week with Blue Life and had a great experience. Excellent briefing. Our guide made sure we understood that we were responsible for our safety, not him. Dos Ojos makes a great first experience with the cenotes, too.
After the dives he drove us to Tulum and we checked out the ruins for about 1.5 hours. Then he brought us back up to PDC for the ferry. This was prearranged with Blue Life.
We brought our gear over on the ferry, so I can't speak to rental gear. The dives do make for an excellent gear rinse, though. Long story, but we had to leave the truck unlocked during our first dive b/c our guide misplaced the key. No problems and the key was found between dives. But, the light our guide lent to my wife was stolen off of her BC while we were away from the truck and our guide's sunglasses were stolen from off of the dash. So, I feel fortunate that nothing else was taken and I must recommend that you lock up everything while it is unattended.