I just recently starting putting my reloading setup put together and thought I should have someone teach me before I started messing with stuff. So I got ahold of a friend that's been reloading 40+ years and he is now retired and reloads for people on a daily basis. He tought me everything I should need to know but I realized in his setup he had no case tumbler? So I asked and he said he thinks they are pointless and he re uses brass 5-6 times on average. Are they worth the extra money and if so why? And which would be the best to get?