I've ordered the kit a month ago. My original idea was to build a printer like this one from scratch. Getting this kit at that price setting even with intercontinental transport and customs was ok for me.
If you order a kit of this type, you will know that you will need some engineering skills : mechanical adjustments, getting everything aligned, programming or at least knowing how to modify parameters in C-header files, using the Arduino platform and some electrical/electronics.
I configured my cables myself, no worries about length or the cable chain; I destroyed some of the stepperdrivers myself, bought some new 8825's at 5 euros and learned that even if you power off while still having a USB connection, the board remains powered and I shouldn't playing around with cables and that sort of things. I had some issues with the moving of the Z-axis too, but by loosening bottom and top screws, moved up and down some times made everything aligned an moving smooth.
And yes I also have issues with the chinese bearings in the pulleys. I will change them too. I've ordered some larger ones. Looking forward to do that.
Replaced melamine corners by aluminium ones, didn't even mount the stock extruder&hotend but directly installed a Titan-E3D V6.
I didn't have something missing, I think, and even got no damage whatsoever during transport.
And I've a lot of ideas to improve the machine.
Perhaps it's my mindset about assembling something. I'm in Europe, so waiting for a replacement piece takes a long time and I just buy it over here. It's no drama for me.
So yes : I'm totally happy. I got some challenges to cope with which I wouldn't have had with a plug and play expensive machine.