Review is wrong: great for some business users
Every BOFH I know in the San Francisco bay area now carries a sidekick. After you've downloaded the SSH client, having a sidekick frees you from being tied to your desk when you're on-call. Go out to dinner, get paged about an emergency, whip out the side kick, SSH into work, examine a few logs, restart your mysql server, and viola, back to the party.