yes it is, only thing is its the same format as the last, if you head to the flashing (!) all the time (im a bit like a moth in that sense!)
you will finish it rather abruptly! i was a little upset as there is shed loads of side missions left!
the first assassins creed made you do them before you could head off for the assassination!
that being said it is still my favourite game at the mo and you wont find a slicker game of its type!