I have been involved with 3D printing for about three years and currently own and operate three 3D printers and have extensive experience with PLA, PETG and moderate experience with TPU. That being said, I've printed with PETG mostly from eSun, and while their PETG filaments print well, it takes a bit of experimentation to find the right settings. This does not apply to this YOYI thread. Whether it's running through the 0.4mm nozzles on my BIBO Touch 2 or Flashforge Creator Pro, or through the 1mm nozzle I installed on my JGAurora A5S, this filament was really stable and only needed minimal adjustment ( although I've probably developed a solid profile in my slicers thanks to working with eSun filament) This filament looks great when printed. It has a good balance of transparency, not too transparent, but this red PETG is definitely not as firm as some other coils I have. I usually prefer 3D Solutech as a filament supplier, but I am very impressed with this red PETG. I may try other YOYI filaments in the hope that they are as good as this PETG. UPDATE: I have purchased and used several spools of YOYI PETG Solid White Filament since this review was originally posted. I recently purchased six of the guitar speaker cabinet coils you can see in the photos and to my dismay five of them had REALLY sloppy filament windings. ZERO filament feeding problems. While I'm glad there wasn't a problem about sloppy packaging, I hope YOYI sees that and tightens quality control; This thread is really good and I would happily buy it if needed.
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