Me, myself and maybe Rhoody....
there are many good instructors in Dumaguete and the surrounding area, Everybody has to follow the same outlines anyway. If you are comfortable in the water you will not have any problems with anyone.
Some are not really patient as they loose money if spending too much time with one student to make him overcome a problem. You will still get certified, even with problems in some skills...
It also comes down if you need the comfort of a resort with changing room shower available, or you can go from Dumaguete to the trainings-sites and back...
just some points to consider
cheers
Rhoody