I have an Up plus 2 and it printed for one year and a half without problems. Then the CPU broke and the price that Tiertime gave me for the CPU was $400. I searched on forums and found a cheaper, compatible CPU and I repaired it with only $80.

Now, we use it in the office with Simplify 3D, but the prints are still good quality, because the machine is built very, very well.
Even if the original firmware is missing.