I'm considering one (or two). It usually gets down to -20F where I am and I need a way to heat a garage (2x S19k Pros isn't enough). At 140W and as low as $130 USD, seems like a good idea. Except that I am concerned about it's 'openness'. Looks like I'm getting a very locked down device. A literal "black box" in this case.
Is this the experience from most people? Does it lack a web UI, is it app controlled only? Does it phone home?
There is a web interface. That's what I mostly use unless I just want to make a quick change...I had to use it to put the pool addresses in correctly due to the app removing my port numbers...but I have limited experince since I just got it going. Mine are in a server room that requires a least a jacket to go into and they seem to hash a little faster than the numbers I've seen here just on medium. Not sure I want to go to high mode but I might. I'll probably break them down tomorrow and shoot a thermal gun on them and see where they need some help and put some heatsinks on them. Then I may crank it up.
Good luck