Have any of you tried it? I mostly cut 3mm plywood and I like the size for this unit with extension rails.
Enter “Neje max4” in the Lightburn search box. You will find some interesting reading. Initial search produced nothing negative. 
I have a Neje 5 pro with an A40640 laser, and it cuts 3mm plywood very easily. Overall, I’m happy with the machine; it’s good value for money.