Good, good, and not so good.
I bought a new(1989) .264 double cavity, aluminum blocks, 139gr gascheck mold. It worked great and shot fine in my 6.5TCU and my 6.5x55Swede.
I bought a new(1990) .410 double cavity, aluminum blocks, SSK275gr gas check mold. It worked too good - I lost it to the guy I bought it from for his BCPR matches.
I bought a used(2008) .452 double cavity, aluminum blocks, SSK270gr plain base mold. It needs a higher tin content than my normal WW mix to fill out the noses and not have wrinkles. It just takes more time and stuff to get it to work. Not as caster-friendly as the others were.
Regards,
Sweetwater