+1 for the primer feed system. The only draw back is that the primer cups on the press will crush if it's not centered properly. Overall, it speeds up the press.
For what it's worth, this is a great press - strong and solid as a rock! Once I got everything set up, all of my gear in place and my routine figured out, it was a piece of cake. I recommend this press highly if a turret press is what you need.
The tubular prmer feed is nice. It speeds things up and very simple to use. The only drawback I have noticed is the feed doesn't hold 100 primers. Maybe 90 or so but when you want to dump a whole tray of primers in there, you always have a few left over. Also, if you want to change primers for a short run, you can manually feed it. Overall a a nice setup.