We went to Same Same whilst staying at the Pimalai on the same beach. We went twice as the food was so good. It's a bit more expensive than the other beachside restaurants on the bay, but worth the extra for great presentation, a unique atmosphere and really tasty food. It's of course less than the hotel restaurants, and we thought just as good food, if not better - authentic Thai food in a great setting.
As with all the restaurants and cafes at this time of year, it seems you have to be sitting down to eat by 19:30 latest, but this place has beautiful sunset views across the bay so worth going a little earlier anyhow. It wasn't busy at all when we visited, but each time the staff were friendly and you didn't feel they were trying to hurry us out to close!
Definitely recommend for anyone staying at the Pimalai as an alternative!