Allflex here. I have one 50cc and one of the bottle holder 5cc. I like both. Just be sure to put some lube on the orings after you sanitize them after use. (or buy lots of replacements to have on hand). Repeaters are lifesavers for me. My farm help is whatever family members happen to be around, and it's much easier to say, "inject here, and just squeeze until it stops" rather than, "see this 3 line? don't go past it!".