Reply to VCI-100 Transport

Looking for a transport option for my controller. I have a huge Timbuk2 bag (hemlock) with no dividers, and would like a low profile option that i can fit in there easily.

I'm between 2 options right now:
A) Decksaver. Anyone have one? do you really feel like its secure in your bag with this? Does it snap on, or just sit snug?

B) One of these. Any experience with these/similar?

Thanks for the input, guys!