I'm not a great person to ask, 100% of my printing experience has been the last 150 hours or so on this printer. I've had 3 failed prints because of inexperience (a raft fixed that - was printing tower-shaped antenna covers for the old T5200 Motorola Walkie Talkie radios) and 2 because of extruder head jams that were really the result of the little 12v fan not operating (24v system.)

That being said, it seems dimensionally accurate for the engine parts I've printed, but the real test will be if the automotive wheel center (which I had to cleave into 5 radial parts) will make a circle when assembled (13 hours per spoke!) You can see some of this at https://www.facebook.com/ZuffenhausProducts

I've only printed with PLA and ABS.