I prefere Aphid wasps.
More fun to watch and more effective.
There are several Utube videos...
No larva skins everywhere and wasps can find aphids on other stuff and come back when/if you get another attack.
Ladybugs for me migrate too much.
Wasps follow the aphids.
For me,wasps came back when needed.
1 release lasted me several years,even though they were released in my kitchen at first.
Outside AND inside I haven't seed an Aphid in years.
I've seed several mummies,but no aphids.
BUT I don't have a winter here...