I recently purchased U840 and found it excelent. Following are some pros and cons which I found.
1. Excellet booting speed
2. Comes with Windows 7 premiu
3. Very Good battery
Good performance and looks. Scratches appeared on touch pad very easility.
I use it with Ubuntu 13.10 and it works perfect. You shall remove intel tools from disk drives though.
I recently purchased Toshiba U 840 from Flipkart and I am very impressed by the machine. There are various points I would like to summarize about this laptop:-
1) Delivery time by Flipkart -