The Pro Chill Krabi Guesthouse is a great hotel if you want somewhere to stay; away from the touristy areas. It's not quite in Krabi Town where most of that stuff is, maybe 20-30 minutes walk.
It's in a very local area with some great restaurants notably one conveniently next door with an English menu and one down the street to the right which sells some of the best Esan/Isaan food I've had in Thailand.
The rooms are fairly standard, most have at least a chair and a bed, some are bigger with beds. The bathrooms are a wet-room format so be aware if you want to use the toilet recently after a shower. The air conditioner worked fine, most of the fixtures are pretty new there it seems.
The beds are quite soft, especially for Thai standards too.
The staff are very helpful and can arrange you trips for a discount, also were very helpful on giving information on where to go locally to do things and bookings taxis. Services like laundry are available, for 40 baht a kilo.
Overall, I would highly recommend staying there if you are ok with a bit of a trek to the local nightlife and a 30 minute drive to the beaches.