One question that isn't in the FAQ that I would instantly be concerned about is exactly what encryption mechanism is used, and where the private keys are stored. Specifically, are they stored in vCider's database?

If my goal was to set up a secure tunnel, I'd be incredibly wary of using a closed source solution like this. Even if you're not worried about the government secretly demanding access to your keys, you might reasonably be concerned about vCider getting hacked.