Meh.
I was thrilled with the Neptune 4 Max upon its arrival since I didn't know any better. The fact remains that the bed will never be perfectly level. The center will always be higher or lower than it's perimeter. Leveling the bed for each and every print is a real pain. I have a Bambu A1 and the leveling process is automatic and spot on every time. I wish the Neptune would be as easy. Since I purchased the Neptune a little over a year and a half ago. I had to replace the entire wiring harness TWICE. The printhead was replaced 3 times. If it wasn't for its ability to print so large I would have scrapped it a long time ago.