Stayed at the Hua Hin Hilton for 2 nights (usually I prefer Marriotts but the location of the Hilton is much better). Standard room (Bay room) but large enough and nice, friendly service, excellent views. Booked through German travel site which brought the price down to 62 Euro incl. breakfast for two. The Gulf rooms are the larger ones with around 60sqm (including balcony).
Posted some photos
here