The vibra-prime is a great time saver when it comes to filling primer tubes. The only thing that I could say is a "con" is that it doesn't work consistently when you try to use the plastic adapters on the end of the tube. If you remove the plastic adapter and just hold the end of tube against the primer exit hole in the flip try, it is 100% reliable.
Pros: Easy to use, results are superb
Cons: Doesn't work consistently with tube adapters
This review was written in the old system and had content requirements that are different than reviews written today.