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 Jonathan Lamp

I'm new to the 3D printer thing, and this is my first purchase of material so I don't have a lot of experience. I bought this, put it in my new printer, and kept on printing things. I haven't had any more problems printing with this than I had printing with the small amount of material that came with my printer. If anything, it seems to stick a little easier than the stuff that came with my printer. The parts I've printed also seem a little stronger than the stuff that came with my printer, but that might also be just me getting better at freecad.All I can really say is, it works and the price was reasonable.