I'm using a toner plastic roll from Microcenter (white) on one side of my printer, and a roll from Maker Geeks on the other. The Microcenter roll is just about used up. Mostly, it's gone well, but I've had four prints that had the filament break (so failed prints). Luckily, none of them were 20+ hour prints. The roll from Maker Geeks has been perfect so far. When you consider price vs. time wasted, I'd still take another chance on the Microcenter stuff...