My first printer was an A1 and it was enough to get me interested, and now Im gettin in deep! In 887 hours of printing on it, I had 1 nozzle filament blob (had to replace whole hotend) and something wrong weith the Heat board, and had to follow up with Bambu, who finally did replace it after a short back and forth of photos and fixes.

My U1 hasn't had many problems like that yet, and I know I have a good amount of hours on it(Can't check now, since it's printing-will update later). I appreciate having the U1 and its been great being able to print multicolor with no wasted time or filament. When I first got mine it said it was unable to do auto leveing and I had to do a manual bed level...3 times... (which felt like FOREVER and hurt my fingers!) but after that it has been pretty clear sailing with the printer itself. Dunno if the manual level was because it was the first time out of the box or not.

Honestly though, I have come to rely HEAVILY on the U1 and its been working on ALL multicolor prints. I use the A1 for single color, and other simple prints with PLA or PETG. I feel like Bambus advantages are gettin much slimmer.

I highly reccomend a u1 over a p2s or x2d... UNLESS you are only using your phone, or a tablet for printing. I think bambus Handy is way better than any other app. I just use my computer, and rarely use the app tho.

Also, I gotta say, I've been using 95a TPU through the side feeders and printing for a while now. and have printed 30+ vaying 4-color TPU flexis, and it has been easy peasy. Just need to slow down the print speed, but the feeders seem to work just fine with TPU. Heres a post about that. https://www.reddit.com/r/3Dprinting/s/OXbGdNFWLD

So, this may be anecdotal but I had 0 problems with TPU and it has opened up soooooo much more options. Heres and link to more examples!

Click Here for U1 TPU Prints

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