Even using Ratchett's tool, it takes me at least ten minutes to fill 8 cartridges, between grinding, putting the caps in the tool, spreading the herb into the caps, popping the caps out, putting on the lids, cleaning off the residual herb from the tool. Big pain in the ass, though convenience on the back end helps make up for it. And that's not counting times when the caps get bendy (the metal is super-soft) and hard to take apart. I can fill the bowl native-style much faster. Much much faster. The caps are great....but not without their issues.