I stayed in one of these houses (which is in the forest side) with my girlfriend for a couple of nights and we really enjoyed our stay! The house is cozy and neat and is equipped with everything one would need on a trip like this. Especially, we enjoyed a huge comfy bed (feels almost like you are sleeping right in the forest due to the glass doors and big window) and sitting in chairs on the terrace observing the woods around. The toilet is a bit unusual because it doesn't have a flush and separates the waste, but we didn't experience any problems with it (no odors, easy to use, etc.). The house didn't have a wifi during our stay, but the mobile connection in the area was decent. The house is located not so far from a village which has a small shop and some entertainments (such as a horse stall and a fishing pond) and is easily reachable by public transport from Warsaw (we took a bus from Jozefow that has a stop in 5-minute walking distance from the house). The last, but not the least, the host - Lukasz - is very friendly, nice and helpful. He was always responding quickly to our messages, providing all the information and making sure that we have everything we need. He even gave us a big case of fresh home-grown vegetables upon our arrival :)
Thank you for being a wonderful guest. We look forward to your return!