3D pens in general are very hard to use. Nothing to hold the filament and the feeder speed is touchy (either full speed or barely spits it out)... fun for kids but not accurate for modelling. Can use the ceramic tip as a welder and use this pen to patch your 3D prints or fix plastic things. Bit of a novelty but it functions and you get what you get for $30.

fast shipping, not the best quality pla, but its nice to have a selection on colors

Perfect

Perfect

This pen works as intended and manages to keep its external surfaces surprisingly cool, so I've used this to construct quick jigs where a glue gun is a bit too cumbersome, or for my originally intended use of correcting minor structural defects in 3d printed PLA parts.

Perfect replacement filament for Moustache 3D pen, great assortment of colors.