After watching the Quicklook Brad and Vinny done earlier this week I was really interested in this game, so I thought i'd download it this weekend and give it a go,after just over 3 hours of playing i've just completed the game. I am really impressed, the puzzles are really well thought andI didnt find a way to cheat a single puzzle. Unlike Portal, there is no story thoughout the game, which I found was a little disappointing as there is definitely potential for a story. Saying that I have only unlocked 9/15 acheivements, these are what I didn't unlock... LINK
Which is interesting, I really think people should play though Q.U.B.E, its Portal quality puzzles with a little more unique mechanics they introduce though the whole of the game.