The location is authentically rural but it is not as isolated as some people make out. It is very easy to get into Krabi and takes only 30 minutes, which is no time at all in context. Island tours (which are a must if you are in Krabi) can be arranged through the resort or you can chat up a boatman at the Leh pier ("island" side) or Ra pier (town side) or contact one of the numerous agencies in Krabi town. The beach is quiet and devoid of naked bodies, beach boys, masseurs or bars. Reminiscent of the quieter stretches in Pranburi 10 years ago actually, if that makes any sense to you. It is a walking beach rather than a bathing beach, but you can walk for miles - both ways along the beach and a kilometer or more out to sea at low tide (do be careful with the incoming tide of course). Most days there is almost nobody on the beach except for the few fishing families that live there. The sand is dark here but it is sand, not mud. The bottom is muddy in places, but you can walk around the muddy spots if going out to sea. Water is warm if you want to swim at high tide but since probably nobody else is swimming, you'll have to look out for jellyfish and the likes yourself.

There are a lot of mosquitos as this is a watery area - be careful not to spray so much DDT you poison yourself.... protection with repellant is better anyway, as no matter how many you kill in your hut, they will be replaced very shortly! Get some loose long trousers for the evening and don't be surprised if you get bitten on the bottom if you insist on wearing your beach shorts in the evening!

Rooms are very comfortable and very well-equipped, as mentioned below. Nothing special at all, but no complaints. Food is actually quite good - both Thai and Western, although of course the chef does some dishes better than others (avoid Pad Thai IMHO, but do try the Southern dishes and seafood) and sometimes ingredients are temporarily not available. Don't be shy to say you cannot eat spicy food - this is the south and even the western versions of some dishes are still a bit spicy. The bar is nice and staff are friendly.

They are so well equipped you genuinely just need to bring yourself, shorts and t-shirts, and those long trousers for the evenings (maybe your tablet is good as they have a decent wi-fi connection) but if you are on a budget you can bring some drinks to put in your fridge and some food, as the prices are hotel prices (150-200 baht for a simple dish). There is also a seafood restaurant on the island (Fish Farm) but it is not any cheaper really. But Krabi with a million restarurants is 30 minutes away of course. Drink prices seem reasonable for Krabi.

Cycling is a practical activity but kayaking through the mangroves is not practical (for fun along the beach, sure) unless you are very fit, as the entrance to the mangroves is about 2 km away and 4km by kayak without the aid of a current is quite a long way.

This would be a good place to stay for a long time, provided you are active. You might get a bit bored or spend a lot on transport if you are not into cycling or walking.

For me, in peak season this is 10x better than Railay or Phi Phi with their masses of writhing bodies, constant noise of boats and overpriced resorts that have absolutely no connection with the local environment or people, but I appreciate that some people like those places as they are, and they may not be as keen on this place, which is for now still rather "Thai".