It is an excellent hotel, but services...
It is an excellent hotel, but services and food are very expensive, even for a hotel of this standard. Resort is very well kept - if you can afford it, book a Lagoon View room with large spa bath overlooking the lagoon - absolutely fabulous!
Beach wasn't anything special, so don't go for a 'beach holiday' - you have to go much farther south for the top quality Thailand beaches.
If you are looking for a spa treat, try the Montro Spa in Hua Hin itself - fabulous service and less than 1/2 the price of the Anantara.
Would also suggest looking at the City Beach Resort and Hilton Hua Hin, both close to the centre of town.
Overall a beautiful resort!