Thanks JC, there are some great pictures of the resort, and the colour of the ocean, it looks fantastic.
I think Dressel Divers do appear a little expensive first of all, but if you can get free EAN 32 then this will really be a huge benefit. I have paid for 24 dives in advance with Dressel, which gave me 15% discount, which works out £14.50 per dive. I would expect to pay £6 for a EAN 32 fill, plus with the quality boats that Dressel seem to operate from, overall I don't think it is too bad.
I will book some additional dives with someone else as well when I am out there so I'll be able to compare. Good to see they do night dives as well.