$175 for a 2-tank cenote trip is kinda high especially when you add tip. I guess if you're happy it's worth it, and I'm sure you will be. Every one raves about the awesome dive guide they just had. I've done at least 10 cenote trips (20 dives) with at least 5 different guides and every single one of the guides was highly qualified, competent, safe, thorough, patient, and interesting. It seems to be a pretty close-knit community and the guides know each other well. My latest trip last December was with Jorge at DiveMike and it cost $115. I don't think we gave up anything at all in saving $60.