im going to fly in c classe from cdg to tlv in june the aircraft is a 777 ans i have the seat 12A im wondering if its a good seat? is dear any better seat?

12A is not bad, although it is just in front of the toilets so it could be noisy if you want to sleep. On a day flight it is fine. 11A or 10A would be better though, in my opinion (likewise 10/11K). I presume you prefer a window seat - I prefer the aisle, which would be 10/11/12C (or H, or, if you don't mind the aisle of the middle block, 10/11/12 D or G). Take a look at http://www.seatexpert.com/_LY_772.html