OVH’s ddos protection is decent but it only covers level 4 attacks, anything higher will go through and your server will get the full grunt of it. Mitigation is automatic but you can also manually enable it and make it permanently enabled.
OVH support depends on your tier, if you go Kimsufi you will get no support what so ever, have fun if something dies on your VPS/Dedi. SoYouStart comes with minimal support, can take days to get a response. OVH support for their own line is also slow, a 20 minute to 1 hour job at hetzner (replacing dead hdd) can take a day.
I have an OVH dedicated server, I want to move it but I have so much data on this thing it’s just not worth it. I’m gonna run it till the HDD dies which it will, its a shitty 2tb seagate so its gonna implode on its self and thanks to the changes they’ve made to Kimsufi since 2011, my decent support went to zero support, I pay £42/m for the box and they changed the terms at will without informing me.
Take it with a grain of salt, you get something decent but as soon as something goes wrong. You wont get shit from them, they are happy to give you a server or service and take your money but don’t expect anything back.