Great long beach, was in the water all day at the beach. Weather was great! 2 cool places to go out further down past the main strip. Went to sand-dunes, but tour kept stopping at places (as per usual in Vietnam).
Accomodation is right on the beach at all of the places, restaurants are on the opposite side. Fresh seafood is great, and especially at the specific seafood restuarants at night right on the water, all seafood is live and you can pick which crab/lobster you want or which prawns you want etc - its amazing!!!
Lonely Planet for some reason doesn't mention South East Asia's biggest Buddha statue (!!!!) which is about 90minutes scooter ride out of Phan Thiet. Pretty amazing! Lying Buddha, at the top of a mountain.
Stayed for about 10 days the 2nd time I went, first time maybe 5. Weather was great both times.