Hey WFTW,
Mui Ne is windy but only from November on. Same goes for the rest of Thailand and most of Asia, they are all pretty much in the off season. Their season is similar to Oz summer.
There are about 7 schools in Mui Ne as I understand it, Only one IKO, a lot of cowboys as I understand it. Windy, choppy and very little beach. On the up it is cheap, summy warm and friendly.
Hope this helps,