The positive things: The rooms are big and super clean. There is real attention to detail with the furniture choice and you get a lot of extras that you don't usually find in smaller hotels in SE Asia (comfy beds, nice bathrooms, lots of furniture). There is a nice cafe on the ground floor and the owner and staff are exceptionally sweet and helpful.
The negative things: The location really is disappointing considering the large number of places right on the beach for half the price, although the rooms were not comparable. However, as I was on Lanta solely to enjoy the beach, I preferred the really basic rooms to the nice ones at Thip House. There are no restaurants nearby, no bars, and no other cafes. So you basically have to rent a motorbike (which I wouldn't rent from Thip because she charges per day rather than per 24 hours like all the other motorbike rental places...which meant we ended up paying full price for renting it in the afternoon and had to return it at 9 the next morning). This is a bit of a pain if you mainly want to spend your time on the beach and don't like driving motorbikes at night. Your other option is to pay a tuk-tuk, but they aren't so cheap on Koh Lanta and charge you per person, which meant about $5-6 roundtrip to an area with restaurants.
As another review stated, the beach that is nearby is a bit gross (smelly with a little garbage that has washed up), which is strange since every beach in Koh Lanta is really nice. So you end up walking about 20 minutes to get to an area that is decent. Also, since Thip House is surrounded by jungle, there are some pretty big bugs which meant we couldn't really enjoy our balcony after sunset because a ton of bugs were attracted to the light.
Overall, I would say if you are a person who needs a comfortable bed and room and don't mind sacrificing a beach location and aren't really going to be out at night, then Thip House is a good choice. As for me, the beach scene is so nice on Long Beach, Klong Nin, and Kantiang Bay, I can't imagine why you wouldn't want to pay half the price to have it all at your doorstep.
Tip: As Thip requires guests to make a bank transfer to hold the room, I would find out what the cancellation policy is as most banks charge a lot for international wires. A few places on Lanta do this instead of holding your room with a credit card which I find a bit ridiculous and not worth it as this just gives the banks another opportunity to extort more money from us.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.