Montecore rules are pretty simple; You can edit and redistribute as long as you credit him and don't make any money out of it. As for those packs, they have all of montecore's models' faces but 5 of them I think. Oh also there's an extra one not made by him. The reason they look a bit weird is, well that's just his artstyle, and its kind of difficult to get used to it. You either love it or hate it haha
And, just like I said before, Montecore has created 25 models but they're basically just 3 body types he uses all over them; a mature one, an average one and a young one. I have all 3 of these bases if you want them.