Easy beach access. Kite Thailand (kitethailand.com) and Kite Board Asia are the local schools with lessons, kites and boards. Kites and board prices are very reasonable from Kite Thailand, they sell Caution Kites and various board brands.
Check out http://www.kitethailand.com for detailed descriptions of Hui Hin and other spots in Thailand, they give good non-biased wind reports too.