I would never do anything illegal via that VPN though, since it would be trivial to trace it back to me. I'm sure OVH wouldn't hesitate to hand over my details if the authorities requested them. But as a privacy protection on public wifi, it works well.
When choosing a VPN, you should think about what you're trying to achieve and what you're trying to protect yourself from. Most non-tech people I know that use VPNs, use them to bypass geo-restrictions. For that purpose, these giant commercial ones are probably fine.