the system involved in putting notes into the correct spot is heavily flawed, i could watch for a minute and 5-6 notes wouldnt land in the correct spot (after getting the upgrade)
size upgrade also doesnt seem to work, after switching to 20x packs and having the upgrade unlocked in the first 3 machines in prestige it hasnt changed their coin/note size, even after multiple completed 10x sets
EDIT correction: seems it works on the free penny machine only?