A part of the review has been auto-translated.
Here is an example of what can be done with an perfect and sturdy design such Sapphire Plus. Now, heavily modified with full and heated enclosure with double sheets windows, Bltouch, AC heatbed, E3d hotend, relocated extruder and much more. With Marlin on top is one of the best 3D printer I ever owned and even seen working in non professional segment. Definitely not for beginners, I didn't even try to run it out of the box. I bought it for what it became . Very fast shipping from CZ. Mine was dual Z end stop without syncing belt and had to assign 2nd run-out filament switch port for Bltouch in Marlin in order to keep both of Z end stop switches. Next upgrade will be replacing motherbord with MKS Robin PRO in order to add second extruder without giving up at the double Z switches.
First let me start by saying, I'm absolutely in love with this machine but stay clear if this is your first 3D printer. The machine was well packaged and came in time. I found it easy to put together because the instructions were clear and well written. But some of the parts were not tightened enough in the factory and the first week after I got it things started to get loose. So my first and only advice, if you get this machine, is to take your time and tighten everything, once you have done that you will have a blast with the Sapphire Plus. So even though my relationship with this machine started badly, it still deserves 5 stars because it's a total beast and I'll probably get another one soon.