I dive there all the time. Do you have specific questions? Some info:
- It's about a 3.5 hour drive from Playa, I can do it in 3 sometimes depending on traffic/weather.
- Xcalak is a small town, maybe 700 residents. No big stores, all tiny mom/pop tiendas
- XTC is a great dive shop. They are known worldwide for their dive training programs. Any given visit, you may be diving with 1-5 DMI trainees.
- If you're worried about conditions, check windy.com or windguru. Any winds over 10 generally means lots of chop and poor visibility, though it's good for seeing big Tarpon at La Poza.
- XTC has about 20 dive sites, and they are mostly comparable to Cozumel, though Cozumel is more colorful. You can do a trip out to Banco Chinchorro, which is amazing.
- The head DMs right now are Andy (Chile) and Mayra (Holland). A very cool and talented couple. I've done many dives with them.
- The head DM instructor (Konrad) just left. There is a new manager there (Darius) who just transferred from Thailand. I haven't met him.
- The food at the restaurant is great, prepared daily by Dalmain (Jamaica). Awesome guy and great chef.
- They have hotel rooms, but they are too pricey for what you get. Check out Casa Cangrejo or Costa de Cocos. There are also a bunch of places to stay farther down the dirt road north of XTC. I've stayed at Casa Caracola, which is amazing, but it's a 10 minute drive.