I have the RCBS unit and have used the Lyman machine quite a lot. The RCBS is the fast of the two but you can always use something like a Lee dipper to speed up the process. My RCBS is about four years old and has never given me any issue. It dispenses accurately and is easy to use. The Lyman that I have used was sent in for repair once over about the same time period. I have not used any others.
