I knew I was in trouble when they changed the elevators. This is a complete and total removal of the original Portal's environment and the insertion of another one where the only anchor point is the original test chambers which barely factor in and are proven to be completely pointless by the test chamber creation process apparently being very off the cuff. I can overlook a few concept tweaks here and there to fit new ideas for a new game.
I can overlook updated character looks to fit a new game engine as none of those were too jarring. This is not your slightly older brother's Aperture Science, but a completely different and revised version of Portal 1's facility. At the end of the day I have supposedly done that but I couldn't tell you what the hell they expected me to think of this joke of an environment. When I played Portal 1 to the end the first thing I wanted out of a sequel was to explore and get a better sense of the Aperture Science facility. Still I'm a bit uncomfortable with it's status as a sequel to the original Portal and playing it makes me unsatisfied in a very specific way.
Portal 2 is a good game, I would even say it's a damn good game.