A great option! I tested many and this was one of my faves in terms of usability and time/material cost. Very versatile and fits most spools, with lots of openings for air exchange. Printing it in clear PETG makes seeing the color of the beads even easier. The only thing that personally made me opt for a different one was how it just sits loosely inside the spool. Pro/Con depending on your opinion/use case. I just don't like how it can fall out, making filament swaps slightly harder. Thank you!