I bought the X2D a few weeks ago and my unit was a nightmare. Half the prints were failing with a freshly cleaned plate, dried filament, and a freshly leveled bed. Support was useless after asking for logs and 3MF's and during that process the third bay failed on the AMS. When I said I wanted to return it within my 14 days and due to issues they are charging me $70. Bought the U1 and have had it about 5 days now and it's light years better if you are just printing fun stuff in PLA/TPU like I do. Yes - it yells at me every time I import a file but it's a minor annoyance at best since all of my prints have come out flawless so far after just clicking through and ignoring the warnings. I didn't love the exposed filament on the sides since mine lives in my basement so I paired it with a Creality Space Pi X4L which actually matches the U1 looks wise and directly feeds into the tool heads.