Agree with the above, Phuket good all year round, and as its low season you can have as much 'instrutor time' as you need to get through this excellent but demanding course, I was diving today and its still fantastic conditions, if you want any tips / advice on the DM course then search the archives here or feel free to ask me. I have actually got two DMTs at the moment and can put you in touch with them if you need first hand advice.