What exactly does this mean? Is it typical to assume that "a nice font" is going to break on Windows 7?
I do have encountered issues multiple times with these new web fonts on Win 7 before, though; it looks like Microsoft changed their rendering engine quite a lot in Win 10.
Again, I think this is a fail of the font providers (they should test), not the users.
Well, learned some new things today and now I'm better for it
Have a great weekend