I have taken my DMT program at Buddha-View Dive Resort at Koh Tao Thailand. With their unlimited dive package, you will have a chance to assist numerous courses with different instructors. Considering the amount of hands-on experience you can gain through their DMT program, I think there are no other dive centres out there which can compete to provide anything close to what Buddha-View can offer.
Our DMT instructor Andrea was super lovely and awesome as an instructor. Thanks to her friendly, positive and professional teaching, all DM workshops were amazingly educational and fun!
I wish I had at least another month of stay to further sophisticate my diving skills. You will also experience special bonding with all the lovely people at Buddha-View. They will become your family and definitely miss them once your trip is over.