Yes I have had some problems with it ... or with the filament, not sure whos fault it is. sometimes the filaments breaks (i think its because its to dry) and sometimes the feeder skips in the beginning of a print. I fixed this by upping the temp about 5 degrees celsius. usually i can set it back down after a couple of layers but I am not always close by for the entire print. In these cases i just let the temp be higher for the entire print. hasnt done anything bad for the results yet. otherwise its a very solid machine, but as you say expensive.