Oh dear! Really sounds like you got a bad 'un there, @Andreas_CH. I’ve had my Up! Mini for nearly 2 years and while it has its foibles, I think your criticisms are somewhat overstated. The only replacements I’ve needed to make are one hot end when I broke off the nozzle through my own laziness, two nozzles and the USB cable. The print results have been really exceptional and the support removal is easier than any other FDM printer I’ve encountered. Don’t misunderstand me. I wouldn’t buy another Up!. I just feel I’ve outgrown it but it’s a little workhorse and has served me well. I expect it’ll keep chugging out great prints for years to come and I’d recommend it for anyone getting started in the wonderful world of 3D printing.
Aside from being “studier” my personal finding with the PrintrBot Simple Metal is that the machine is more of a plug and play approach by PrintrBot. It works and aside from 1 clogged extruder, the printer has been operating flawless for the past couple of months. The Metal just works and is already “upgraded” with parts such as the bed sensor, gt2 belts, etc. I was in the same predicament of choosing a wood kit over it since I have the knowhow and experience in modifying and building a personalized printer.
I presume PrintrBot positions their printers based on these expectations… customers who just want to start printing (Simple Metal) and a cheaper kit with options to upgrade and collect both knowledge and experience in printing. (educational purposes, tinkerers, makers)