Brothers is excellent, the atmosphere is incredible and I never really got stuck on an area too long, the puzzles and platforming had just the right amount of difficulty. I finished in one sitting, but the number of hours was about right (four to five maybe). Anymore would have been pointless padding. I had to keep the older brother on the left side and the younger on the right to match up with the analog sticks, otherwise it would screw up my brain.
This perfectly sums up how I felt about the game. The game is poignant at the right times and never tries to force emotion on you (but totally earns emotional impact when it means to).
I, too, had to keep the older brother on the left and the younger on the right. Having said that, I can't think of a time where I ever got frustrated controlling the brothers when trying to play the game. I think it's a testament to the design that the game wants you to embrace the unique control and control of both brothers, but not confuse you and ruin the immersion.
I played it on my PC with an Xbox 360 pad, but I'm going to download it on my PS3 and play it on my TV this weekend.