First the good news: the 2020 alu bars are precisely cut. Build instructions are clear enough. I have build a working 3D printer with this kit. Now the not so good feedback:
Lots of tweaking of almost every part is needed to remove access plastic. The provided nuts for the 2020 bars are not t-sliding nuts, but small M4 square nuts.
They do not fit nicely and are to loose. I had found some M5 square nuts locally and used M5 bolts for the corner peaces. Now the really bad stuff: the crimped connectors are bad, see photo. I had to redo all endstop connectors.
Very good at this price. I had no knowledge about the printers. But i can assembled with help of manual and the seller. The manual is very detailed in English and the seller, rose kevin is very comprehensive, communicative and excellent engineer you can get his assist.
The main board is integrated newly designed board so easy to assemble and faster than i imagine. It was very funny experience to assemble.