I've had a lot of problems importing snapshots lately. Mostly I'm using it to migrate between a live and staging environment, to start new projects.
I'm making the archives from the current version, and importing them within a few minutes, also to the same version.
Frequently, I'm seeing this error message: Error: Manifest data not found in archive, or another, about a missing timestamp.
Once I get a functional archive, it's smooth sailing restoring from it. But man, does this crimp my flow.