The main problem with the Raise3D E2 is it was clearly released with half-baked firmware and terrible support, which is not a great combination for a $3500 printer. I was telling THEM how to work around the machine's shortcomings when I had to figure them out for myself because the US support is so bad.
Once I realized that them saying it supported ABS was a lie, it got a lot easier. Also, I had to abandon 0.20 nozzles since their unfinished calibration system only supported stock 0.40 and manual calibration was a huge pain. So giving up on 0.20 and moving to PETG instead of ABS solved a lot of problems, but it was much more fiddling than I wanted to do for a $3500 investment.
Duplication mode is awesome, and PETG is good enough with the 0.40 nozzle to print brackets for the upcoming coil fan kits. I've been using it pretty much just to print those brackets night and day. Not what I expected to be doing with it, but whatever.
0.20 nozzle auto calibration support was just added a week or two ago, many many many months after release. It's something it should have had from day 1. Camera is still a mess because the firmware is incomplete, so hacks I made to work around it and force the camera to iris down (essentially adjust the white balance properly) are what others have to use also until Raise gets their act together and gives user access to the camera parameters - should have also been a day 1 feature.
So yeah, it worked out okay, and I have it dialed in for a good purpose now so I don't have to mess with it. I think they'll eventually get the software to where it should have been at day 1, but I would never, ever recommend Raise3D to anyone that wasn't a fiddler. It's got some great convenience features, but it's just overshadowed by half-baked firmware and terrible support.