I dove both Marietas and El Morro with Vallarta Adventures in 2014. The dive service was excellent. The dive guides and crew did as much support as each diver needed/wanted and allowed us to take care of things that we preferred to do by ourselves. The visibility was 80 feet or more and we saw a nice variety of wildlife. The crew also provided great entertainment and worked hard to make our 'Adventure' a fantastic experience. Five stars!