I have a mate who's spending several days at Krabi and on Koh Phi Phi and I'd like to help him choose accommodation. I'm not too familiar with that area of Thailand.

He's in his late thirties, looking for relaxation and maybe a bit of nature rather than a party or sex tourism. He's not rich, but will likely spend up to 100$ a night if the place is really special and it's only for 2 or 3 nights.

There's a Nantra resort in the Krabi area that's extremely good value for money and has a (non-white sand) private beach, though it's cut off from everything. He may stay there. Phi Phi is the biggest unknown at the moment but I'll be happy to hear Krabi recommendations as well.

Have him look at Srisukant Resort. Down the beach from the National Marine Park and an easy walk into Ao Nang.