I have the one from Bavarian beads that has the three sizes. I love it for what I want to do .. which is predominantly make beads.
It doesn't keep the texture on the beads ... I just re-add that with a knife if I want it. It allows me more creativity with how the final bead looks ... more shell vs ammonite.
There was a previous conversation and it seemed like the Graphite24 push mold was more popular for versatility.
Here are a couple pix. The second pix ... I used it as a push mold with boro to make a popper for Noosa jewelry.