I have the same die and don't see any benefit to it. Actually I found it to be a pain in the ass because unless the top is tightened really really tight the decapping section was passing through the threads and coming down with the casing..
and acrashb, if you have nothing to add to the thread go elsewhere otherwise you are trolling.
This is what hornady says:
Ha, all I got was slippage until I busted my knuckes tightening the spindle lock.
Other than that, once I got the spindle nice and tight it worked just fine. I don't see anything wrong with the dies except for that.