Honestly...I haven't used it yet (the dro)
Please then, report back after you have used it enough to get a feel for it!
That could be awhile, I been doing it so long without using one that I believe I'll have to "force" myself to use it.
Shouldn't be any harder than forcing yourself to use your new mill, or are you limiting yourself to only move the table and spindle as far as the old one could?!?!
I should add that if you truly love doing the extra math and figuring lash, doing it all the old analog way, then it is great that you derive your enjoyment in such a manner, while at least on a certain level, I can fully understand and even applaud your methods!!!
I actually spent a fair amount of my machine time doing precisely that (back before DROs existed or at least were common and affordable), but now find that using the DRO vastly speeds my work, ensures better accuracy and minimizes common errors, as it is basically just a "GPS" for your locations on the mill table.