The cvault is OK at best. Really not much different from a canning jar, aside from the cvault being light proof.
I do like the placement of the bovita pack, but I have also put 2 8gram packs into 1 jar. 1 on top and one on the bottom, and they do make full contact with the bud. I've never had any fucked up flavors yet, so I don't buy into the cvault lid.
To each their own I suppose.