What should I look for when choosing an at-home derma roller?

I’ve been looking into at-home derma rollers and I’m finding it surprisingly difficult to compare the different options available. There seem to be quite a few differences in needle sizes, roller construction and overall design, but it’s not always clear what actually matters when choosing one. For those who have used a derma roller at home, what did you look for before buying yours? Was there anything you wish you’d known before choosing one? I’m particularly interested in the practical side of using one regularly things like ease of handling, cleaning, storage and whether the roller itself held up well over time. I’d appreciate hearing about people’s actual experiences rather than just product recommendations.