Except for the unpatched kernel vulnerabilities because they keep using an out of track non-LTS kernel. Maybe that's changed since the last big kernel exploit that went unpatched for 18months on Mint but the project has an atrocious record on security and no matter how much you like it you shouldn't ignore the warts it's got.
I'll take the warts and security vulnerabilities that Mint has versus all of the problems Windows has, especially for a desktop system. Of course I wouldn't run Mint on mission-critical enterprise servers, but that isn't the target market, and no one with major infrastructural concerns needs the simplicity of Mint, either. It isn't perfect, but Mint is a viable alternative to M$ for the average (or slightly above) home user.