In before the common (and sane) suspicion:
- 100% SLA: it's a cash-back agreement, not a technical promise. Also it doesn't cover the maintenance period (FYI I never had any maintenance downtime for 5 years but YMMV).
- free bandwidth: it's a real thing in France, the bandwidth is free.
I am a happy customer of OVH since 5 years, either personally or professionally.