I use it quite often, my N10 never gets hot while using it that I have ever noticed. The key to a good photosphere is to not move your feet from the original spot you are standing. Make sure you rotate yourself in the exact spot,like you were standing on a lazy susan. And put the tablet at arms length & do not change that, hold the tablet with your elbows locked and arms fully extended. Any deviation in focal length from the first picture will cause issues. From the first picture I take, I go all the way up, then all the way down in a counter clockwise motion. I don't know if that part makes any difference, but I am getting good results consistently with this method.
If anything is moving in your sphere such as waves on the ocean, a flag in the breeze, boats moving in a marina, cars driving by, people walking or moving, dogs/cats playing etc, then you will always have strange looking sections in your photosphere. Hope this helps.