This past year I was a mentor for a FIRST robotics team at a private high school for underprivileged kids. They are in a new building that is less than a year old (one school year) and the 12 new Creality printers that were donated as part of the engineering lab have all failed, every single one. I know nothing about them other than what I read here and now the rack of non functional printers at the school. You get what you pay for when you buy a machine that must be mechanically and electrically accurate and reliable.