6 reasons I regret buying cheap DIY 3D printers
Cheap 3D printers don't respect your time or your patience.

I've been in the 3D printing hobby for a long time. Back then, you had a choice between industrial machines that cost more than your car or hacked-together machines built by hobbyists from assorted parts. MakerBot was making open-source printers housed in wood, which were more approachable as kits, and then the singularity hit. Josef Prusa iterated on several different designs, and the Prusa i3 was born. Built to open-source ideals, it was quickly copied by plenty of other companies, and the era of cheap 3D printing kits began.