We did a scuba dive course a couple of years ago in Cozumel with another company and it was great. We recently went to Cancun and we took Manta DIvers new divers course. They were terrible, they flew over the ocean at such fast speeds in a small boat we were bouncing like crazy. When we went to our first dive we let the instructor know our ears needing equalizing as he was pulling us down to fast I guess in order to stay with the certified divers. After the second time in a short time period he blew up our vest and told us to go to the boat. On the second dive he used a rope and I was able to go at my pace and had no problems. My wife needed a little coaching and he left her after a short anount of time while she was about 5 or so feet from the top and he starting leading the certified divers away. She of course freaked seeing everyone leave and started breathing to fast, so she went to the top and the ocean was so strong as it was a red flag day and she almost drowned. I noticed her problems and went to her. At the same time the instructor must of saw me go up and being a faster swimmer caught up with her when I got there. On top of this the boat was no where in sight. Lastly the equipment was dirty and uncleaned. The shop claims it's cleaned once a week. I don't know about you, but I don't want to put someone elses mouthpiece in my mouth without it being cleaned.