I have tried a few of these capsule making machines, and this is the best of the bunch, but still frustrating (the ones on Amazon, that supposedly make 100 at a time, are even more failure-prone). With all of them, the ends of the capsules break, and I get powder everywhere, and I lose the ability to measure how much is in a capsule. It's fine if you really don't need any level of precision, but impossible if you do