Because this kit was cheaply made, you would expect the holder to be misaligned. That was not the case. It when together like a perfectly sized foot on your foot. Some warping of the PC Blend did require some adjusting, but the aluminum parts were perfect. I didn’t have to spend much time adjusting the frame and it seems perfectly square, because, you know, I couldn’t. The precision wound up being square enough, so I’m happy with the frame.
Mechanically, the motors, rods, and gears were in good condition. The study works well. I did have one glitch and that would be the GT2 belts. One of the two belts was too short to be used. I had spares so it was no huge deal. The linear motion was smooth in the X. Y. and Z direction. I read stories about the poor bearings. The bottom line is that the printer parts worked very smoothly.
The wiring was perfectly marked and the wires were the right length. Electrical is another story. Everything is near perfect. The kit came with the newer magnetic and steel ball filament sensor design that was similar to the new ones with the MK3S. I have never disassembled my Prusa Mini filament sensor but it is probably similar.