Review on YOYI 3D Printer Filament - PETG 1.75Mm 2.2Lbs(1Kg) Spool, High Accuracy +/- 0.03 Mm, 100% New Raw Material! by Mark Saric

Consistent diameter, no bubbles, cracks, or flaws. I have purchased a few spools of this filament. The filament itself is great! It produces pristine prints all the way through the roll!. Watch your machine and spool though. This filament was NOT tangled but it DID have a place that filament was jammed down the side of the spool. Meaning the filament was trapped between the properly spooled filament and the side of the roll in one place. This caused the spool to pull out of the spool holder and come crashing down on the printer below. Watching the video of the print showed that the filament was trapped causing this. I was present and able to correct the problem by simply pulling very hard on the filament. However when the spool came crashing down it pulled the filament out of the extruder while it was hot. This caused teflon tube in the printer to melt solid to the filament and ruined the print costing about half of a roll. If i had placed the spool on the table with the printer, the extruder may have been able to overcome the jam on the spool.