Props to the puzzle designers for creating 20+ puzzles that were maddeningly hard. Does that make it the best of the Portal mods? Not really, or at least, not anymore. As challenging as the puzzles are, the game doesn't strike a great balance between the story, gameplay, walking sections, and crazy set-pieces. To be fair though, I don't fault this extremely talented team of modders for having certain limitations, so despite being one-upped by more recent mods, Portal Stories: Mel is still an exceptional experience that brings a real challenge to us, the Portal fans.