the paint gun idea seems fun at first, but it got boring fast. i found the puzzles kinda meh. the jokes aren't really funny and it has the stories mel performance problem
The main reason why I give this a 'meh' is that it costs actual money while the much better Portal Stories: Mel (and many other mods/community test chambers) are absolutely free. It's not BAD, it's just less fun and has way less content than Mel, and Nigel is no Wheatley or Virgil.