Catito,
Scuba Du keeps the dives at 50-60 minutes. The reefs are to the south and require a 30 minute or so boat ride. Typical for any operators who is based in the north and close to the city. There is shore diving at the resort. Typical for what you would expect in Cozumel. No issues with the noise level. There are a variety of room options available. This is our go to place in Cozumel. Very happy with the environment. The same employees are at the resort visit after visit. That tells me a lot.....