I purchased several rolls of ColorFabb a few months ago and have been trying them off and on to get them to print.
"Inconsistent" is probably the closest descriptive word, albeit without the vehement annoyance implied. I have a roll of red PLA that is barely used, yet every time I end/stop a print or even after the initial loading of it, it jams and the nozzle has to be cleaned again. It also hates every distance between the nozzle and print bed; too close and too far away is apparently the tiniest fraction of a knob turn on the print bed and I cannot, for the life of me, get any of the colors to go down well at all. Feeder clicks even if the nozzle is actually too far away and no temperature range from 200 to 230 seems to be right.
All this holds true for both the heated glass bed (yes, I've varied that in all manner of ranges, too) and the PrintInZ Zebra Plate (unheated).
I put my old roll of silver Ultimaker PLA in the printer and it works much better on the first layer. The difference is absolutely staggering.
It's probably been too long to expect any kind of return or customer support on them, but I will probably be avoiding ColorFabb from here on out.