i have a robo3d printer which i had a few issues with once i bought it, mostly pertaining to the temperature probe, it would shut down after 30 mins into a print. i ended up tearing it out and putting in a new one and then had the same issue... getting upset i bought a flashforge creator which i love its a dual head printer. almost a year later i went back and tried to see if i could fix it or use it for parts, i ended up drilling a hole so i could screw the temperature probe in place instead of using the kapton tape that would come undone from the heater block. so now i have 2 working printers.
in the end i would reccomend the creator by flashforge only because i haven't had a single issue with it, and because it has a dual print head, so you can print 2 filaments into a single project or even just have 2 filaments preloaded and switch between the two with out having to go through all the hassle changing filaments.