Not being able to buy the game yet, I decided to watch a bit of what people on youtube are calling "Let's Play". A series of videos where players, play through a game. One guy has started one for Limbo and from what I have seen it has made me want it more and more. 
 
So if people are not too sure on if they want the game or not, I would suggest watching episodes 2 and 3, because they give a good feel of the game. Episode 1 is what you would have seen if you watched the quick look with Brad and Vinnie and episode 2 goes further than the quick look. 
 
I don't think I will watch them all because Limbo is a game where you should really play through for yourself first, and working out the puzzles, and getting killed by unexpected objects is what Limbo is all about. Anyhow the links for episode 2 and 3. I also recommend not watching past episode 3, but do as you feel. I hope this helps you decide on your purchase.
 
All credit goes to the video creator, thenewonelisoncruz. 

Yes, watch people solve the puzzles, so when you buy the game you know exactly what to do.

" Yes, watch people solve the puzzles, so when you buy the game you know exactly what to do. "

once i played it, i wished i hadn't seen the quicklook, even, so i wouldn't know those early puzzles. it's not that long a game, 25 minutes is a significant chunk.