I seriously considered getting a couple of those, because I like them a lot, but ended up being Sensible. There genuinely are enough pens lying around here that if unused refills didn't gradually dry out over the years I would never have to buy another pen again. I'm convinced they breed in corners. I still have a couple of the branded pens from a job I left seventeen years ago and I never deliberately stole pens from work. It's just that with running between lab, office and pilot plant I ended up with half a dozen stuffed into various pockets including my back jeans pocket, and I regularly forgot to take those out before going home. I'd round them up every so often and take them back, but always missed one or two.