The autoprime is ok but why add this extra step, get the safety prme and riser for the powder measure, and your loading time will speed up noticeably.
The LeeAutoprime allows me to feel each primer go into the case,which is one method that I use to judge if a load is safe for my gun.(whether primer pockets are loosening significantly after several loadings).As for the time difference,I find it just as quick to load and use the Autoprime than to load the primer drum on the press,and then have to clear the inevitable jam that occurs now and then.
How many people start with LEE gear,then later upgrade to another press and gear?Quite a few that I know.Yet I don't know anyone that started with RCBS,Redding,etc and later switched to LEE.I chose to start with RCBS gear,and 30 years later,I am still using the same press,and most of the same other gear.I have since purchased some gear such as an electronic scale and power chamfering tool that weren't available back then.I didn't see the point in buying the same gear twice,so with the exception of the Autoprime, I skipped the LEE gear altogether.