Just got my hands on this Gratkit Matte Rainbow PLA filament and WOW, the color shift is absolutely mesmerizing! Printed a bunch of fidget toys and the gradient effect makes them look like little pieces of art.

The matte finish is *chef's kiss* – no weird glossy plastic look, just smooth, velvety layers. Bed adhesion was perfect right out of the gate, and zero clogging issues even at lower temps (I ran mine at 200°C).

Pro tip: The color changes every 8-10 meters, so plan larger prints if you want to see the full rainbow magic. My Bambu P1S handled it like a champ using generic matte PLA settings.

Only minor gripe? The cardboard spool feels a bit cheap compared to the premium filament inside. But hey, it's eco-friendly and came with a resealable storage bag (though that zipper is tricky!).

Seriously considering buying all the colors now... my printer might need an intervention soon!