Review on SUNLU PLA 3D Pen Filament Refills - 10 Bright Rainbow Colors, 164 Feet Total (50 Meters), 16.4 Feet Per Color (5 Meters), 1.75Mm For Most 3D Doodler Pens, Easy To Use & High Compatibility by Lequon Kirkpatrick

I'm just learning about 3D printing. Along with my printer I ordered this collection of PLA filament.I'm pleased with the performance of the Sunlu filaments. I have had some adhesion problems, but worked them out with various trials of tape and adhesive materials. I find that a skirt or brim are just not sufficient for good adhesion, so I use a raft for all of my prints (if you're into 3D printing at all, you'll recognize the terms).There is sufficient material on each spool to make several mistakes and yet make several good projects.Overall, I'm pleased with the Sunlu PLA.