I just saw the ad for RCBS' new version of their hand priming tool. This looks like a big improvement over the original design, and on the Lee design. In summary, it is basically the same as RCBS' previous version of the tool, but with no need to use a shell holder, there is a kind of universal shell holder built into it that RCBS says will handle, I think, from 25acp to some big magnums. The other refinement is that the primer tray has been resized and reshaped to better direct the primers to the cases.
The older model has been a good tool for me, and my only complaints have been that I'd have to occasionally shake the tool to get the primers to feed, and I never liked having to take the tool apart to add a shell holder. It looks like they have solved both of those problems. I've bought a couple of Lee Autoprimes within the past two years and they were both bad.
If you need a hand priming tool, this new RCBS tool may be a good option.