I have! It really depends on where in Thailand you plan on visiting
I stayed with a few friends on the island of Ko Phi Phi
It was hot, humid, but it was truly out of this world, I highly recommend it to families and friends
Which part are you visiting?
Here's some good information for you - http://www.touropia.com/explore/thailand/ko-phi-phi/
The area was damaged quite badly during that Tsunami, but, when we arrived everything had pretty much been rebuilt and fixed up
(I went 2 years ago)