Been using OVH for the past 5 years, had some problems with DDoS attacks before, some heavier once made it passed the DDoS protection. Now I've upped my game servers onto their Game Server Dedicated Box to get the most out of the DDoS protection. I'm running both websites, voice, game servers and all on them without a problem.
The box itself sounds small but u can do so much based on them without a problem, also running ESXi on the box with 3 VM's, one Windows server for all my game servers it use to be Linux but decided to switch it up a bit. One Ubuntu VM for websites with a Plesk Panel and running a total of 8 different websites without a problem throughout 4 different IP's actually running really well, better than I'd guess. The last VM is basically an Internal Firewall also containing an extra DDoS layer which so far hasn't been activated.
Since I've switched over to the Game Servers box I've never had a problem with DDoS attacks or anything.
Also related to DMCA, never had any problems. From all I've experience OVH is a great hosting company, they really value their customers and help you out even more than they should. That's from personal experience.
I hope this helped you a little bit and got a bigger idea of OVH, I'll never go to any other hosting provider. OVH is good, fairly cheap and I love them.