I reload Berdan 7.62x39 brass and steel cases.
I stocked up on Berdan primers back when they were available.
With the Russian import ban, they are no longer available. So this kit will scratch an itch with some folks.
I watched the video and think that's a good kit, but at $40 it may or may not be right for everyone.
I am familiar with the utube videos that do the mostly the same thing and use 1/4 copper tubing for the sleeve.
If a person had a lot of Berdan cases they wanted to load, then this kit will allow that.
I would try it if I didn't have any Berdan primers.
I would guess it would work on steel cases also. I pick up a lot of 7.62x39 steel cases with a magnet every range trip.
It's fun to reach in my pocket and show them a loaded steel Berdan round when I'm told "those can't be reloaded".