It's Debian instead of normal mint.

...but seriously, it uses Debian as a base for its upstream packages instead of Ubuntu. They're very similar and you won't notice a difference.

I'll disagree and suggest to go with the latest release of the normal (Ubuntu-based) Mint instead. I prefer Debian over Ubuntu, but there's realistically little difference. And if you're just getting into the Linux world, you'll want to be using what's used by most people in case you run into problems and want to follow written instructions or ask for support.