Hello Paul, for over twenty years I have used a bench mounted Forster priming tool but earlier this year one of the forum posters put me on to the 21st century tools.
And I will say that I am pleased with the purchase.
+1
Fair warning - The 21st Century tool is the only priming tool I have ever used. I researched hand primers on the internet before making my purchase, and this tool was universally praised and had no complaints. In use, I have found that it is indeed simple, reliable, easy on the hand, and precise in its primer setting capabilities. Its high quality makes it a pleasure to use.
The only complaint I could possibly see is that each primer must be individually inserted by hand into the priming cup, so it may not be the best for high volume priming. Though, I have primed up to 120 cases in a sitting and have not found this to be a problem.