The game is pretty much perfect, except that it is too short.

User Rating: 8 | Portal PC
Funny, a little challenging and with a good pace. It's fascinating how a game with just a simple "feature", the portals, can provide for such a diverse and fun experience. Everytime you jump across a cliff to be hurled across the room to a seemingly impossible to reach platform you feel like saying "weee" as the camera rotates.
Dealing with the robots is not as much fun however, but it's an obstacle easily surpassed and it's good to feel challenged for a time.
The developers keep us entertained by feeding new challenges and objects as the game progresses but they're hardly repeated, leaving a sense of under-utilisation of the game's potential. Too much of an effort on not leaving us bored, perhaps.
If it was longer, more problems would undoubtedly pop up, but as it is, it's nearly perfect.. however, a short game is a short game. As such, it can't get a higher rating than 8.