All the benefits people report getting with the $1500 AMP, I get with a drill that was a B-day present, and a $17 map pro bottle from ACE. I can knock out a couple hundred cases with not much strain. Don't have to sit in the dark, can see the anneal line form just under the shoulder in the light. Seating force maintains consistent, and I pin my seating depths CBTO by .0005 either way. I certainly can't shoot the difference of .0005 seating depth variance.
I guess I could add up the cost of map pro bottles to casings and see if over the years the AMP would balance out.
Then again, I think I can still throttle through the annealing process faster with my technique.