I played the first episode or two, about three years ago. It was okay. BttF fans would probably enjoy it, if only for the characters. They use Michael J. Fox and Christopher Lloyd, I believe.
The thing that put me off of it, eventually, was the the old-fashioned point-and-click mechanic -- you know, go here, collect item A, go there, collect item B, have conversation, go here, combine item A with location B, well that doesn't work I'll try something else, etc. I don't find that gameplay style very interesting. I prefer their more narrative-focused games. There was plenty of dialog and conversation here, just too much backtracking and old-fashioned adventure mechanics for my taste.