Yes, we have used them. Our shared hosting used to be on a a Xeon E3 1245v2 with 32GB Ram and SW RAID1 from SoYouStart/OVH. Their email support is slow and apparently you can never solve any issues via their phone support. However, you shouldn't really have to ticket in. You can request KVM/IPMI if needed. The hardware is all monitored so that in the event of failure, it is replaced quickly. Uptime is good.
We have used OVH for a few years now and they are the best ones we have ever used. The support on the other hand is a different story. Takes forever to get an answer and their phone support to get an answer is like finding a needle in the ocean.