Quick delivery (CZ) and no problem to mount it.
Need some improvments prints before to use with original filament detector and filament spooler like : https://www.thingiverse.com/thing:4718226
No problem with firmware installation but you need to load CH340 or CH341 drivers in order to see the print with Creality Slicer 1.2.3.
BL TOUCH works great too, but you'll need to be sure that the bed is well leveled before.
Once installed mine has worked great. Unlike a certain review I saw on YouTube, the estep setting change is done for you when you update the firmware. My only minor gripe is the very tight fit. The only way I could get the outside bottom screw in was to insert it with the extruder about half way on, then push the extruder on the rest of the way and tighten with a ball-end allen wrench. It also squeezes against the hot end wires a bit.