Using these to monitor temperatures around a two story house to monitor for hot/cold spots. The 3D printed cases are nice, very high Wife Approval Factor, the assembled kit I ordered just worked right out of the box. Now that I've built a couple, I'll probably order more kits and do the soldering myself to save a couple bucks on each.
However, the components you get with these are priced very competitively, to get a case printed/shipped online was going to cost $20, the NodeMCU is $5, the PCB is $4, and the headers and DHT22 add another few dollars. Basically I'm saying it is a good fair price, and quick delivery from BKHobby, and I would recommend to anyone wanting to tinker.
The one time I had a question, was silly really because I was referring to an old guide he wrote, but nonetheless he was helpful and made sure I was able to work through the problem and flash the right code back into the box (as I was very new at all this ESP8266 stuff).