We loved Our Jungle House.
I had a great experience booking ahead of time with great communication from the staff and an easy process for leaving my deposit.
Driving through Khoa Sok we saw many, many guest houses and we were very happy to discover that Our Jungle House was at the end of the road, and not right in the middle of the town. When we arrived it was exactly as pictured. There were monkey's in the trees, the house we stayed in "Thai House" was a good value and perfect for our family of five, with an upper loft with double bed and two singles pushed together in the main space.
I've read a few reviews complaining about bugs and such and it's definite that this is the jungle. If you're going to be freaked out by bugs you might not want to stay in the jungle of southern Thailand.
The one downside is that the beds are super hard! I found this to be true though much of Thailand and have mostly gotten used to it but when other reviewers note the hard bed, they are not kidding. If you need a comfortable bed you might find places with marginally less hard beds though you may also have to wait until you get home for that luxury.
The restaurant is good with reasonable prices and the staff is hardworking and very friendly.
We did an elephant tour and a great night safari (and saw some super cool things that night with the guide), both of which were arranged by OJH. I wish we'd had time to go to hot springs.
The one unexpected benefit we got from Our Jungle House was meeting the manager, Bodhi Garrett. Bodhi is an American who has lived in Thailand for quite a number of years and is very involved in making a positive difference through his involvement with a school for Burmese kids, Tsunami Relief efforts and homestays on local islands where the people are still rebuilding after the Tsunami devastated land, homes and ecosystems. We found Bodhi to be a big inspiration and recommend having a chat with him if you get a chance.
Oh, and we found it pretty wild and lovely to have the combined pleasure of jungle access and environment with fast and free wifi. The world is odd.