trust me, from someone who suffers the agony of the permanent heel bruise
footprint insoles are not a gimmick, ive tried all the best stock stuff from the vans era pro gel premium insoles, the ole supra gel insoles when they were actually nice, the soletech stuff, and none of them really helped in the long sessions.
first time i got footprints i did think, damn these are a gimmick. i had had the first ones that were just supposed to mold to your arch, then the crappy yellow kingfoam ones that just eventually crumbled up, then i gave it one last chance and got the footprint elites.
trust me they DEFINITELY work, i first threw them in some janoskis and i never have had any impact problems since til now. i thought maybe it was me and swapped back to stock and it didnt work out, my perma heel bruise was feeling the pain. if you have an arch get the elites they are some kind of magic