Amanpuri is the original Aman, built in 1988, and it still runs like one: villas get tidied every single time you leave them, staff remember which tea you drink by day two, and the beach you're paying for is the calmest stretch of sand on this part of the island, shared only with the Surin next door. That's the case, and it's a strong one.
The catch is what you're booking into. The entry-level rooms don't get you the real Amanpuri experience — multiple people who've stayed say the pool villas and above are where the brand actually delivers, and anything less feels like visiting without being invited in. One guest ended up in a villa reached by over a hundred steps with no buggy offered until she complained; the resort does run an electric buggy fleet that shows up in under a minute if you ask, but you have to know to ask. The food is good rather than thrilling: three restaurants (Thai, Japanese, Italian) cover the bases, but more than one long-stay guest got bored of the rotation by day four or five, and this is not a beach-resort stay in the Six Senses or Rosewood sense, so don't book it expecting a full beach-club scene.
None of that changes who this is for. Go for the privacy, the Pansea Beach setting, and service that genuinely anticipates rather than performs: pick a pool villa or higher, give it three to five nights, and skip the wet-season closure between May and September. Couples and honeymooners get the most out of it; families can make it work, but keep the kids in check around other diners. Book it for the beach and the quiet, and choose your room category with intent.