Hi Sunny............I'm afraid I know nothing about Dressel Divers, and little about Playa del Carmen. Playa has exploded with tourism the last 10 years - the parts I saw en route to Cozumel were pure commercial down-scale tourism. There are luxurious destination resorts nearby. I'd recommend Cozumel, if you can find good instruction. There is tourism, but it's easy to escape, and the waters are pristine. I dove with Blue Bubble, almost by accident. If there is a way for you to email me, I'll respond with a good contact name and number. I stayed at a fine, $50/night hotel called the Flamingo. Do it, but soon, because late summer is hurricane time. I'm going to return just as soon as I find a reasonable flight.