The park is a definate winner in Cozumel!!
We rented a jeep (a beat up one which we had a blast in.. our kids are older so it worked for us) $60/day cash through Cozumel Insider/sherri. that got us to several places on our schedule.
First we drove all the way out to the ruins past the point (took 3 hours round trip including walking time. A waste of time in our family's opinion.)
Then we cruised on over to Mr. Sanchos. Free to enter. Had a nice lunch came to about $26 including several beers. The outside market was cute, clean and people friendly. We swam there and the beach & water were great. They have the water trampoline there the kids enjoyed.
Next was out late afternoon swim with the dolphins at Chankanaab Park. AWSOMMEE!!!! DS10, DD11, DH,38 and me the photographer all agreed the opportunity of a lifetime.
Our group was very small (5 only!) the interaction and trick parts were more than we imagined. We bought the $45 video and several photos. Then we snorkeled in the afternoon in a very quite/ not crowded water right off the beach area.
The park was clean, friendly staff. $10/per person but free if you booked the Dolphin Discovery Dolphin swim.
I am working on our trip report now and it should be ready later this week.
Good luck,
Barnesquad