Feedback on Gandi hosting?

For the last few years, I’ve been a mostly happy customer of Sivit (now bought by Nerim). But recently, technical problems have become more frequent, and today, for the first time, a crash made me lose some data which was rather painful to restore from backups. Also, they are still stuck on with an ancient 2.6.16 kernel.

So, I’m looking into alternatives, and a promising one is Gandi hosting, based on virtual machines like Sivit.

  • Would you recommend it for a mission-critical server?
  • What’s your uptime? When was the last time your server had an unscheduled outage?
  • When was the last time you lost data because of Gandi?
  • What are the limits due to the Xen-based hosting? Can you run your own kernel (like the squeeze one)? Can you build additional modules (like tun)?
  • What else should I know?