i might trade in a few games and use an gift card and get ACB 

But as i for one reason loved AC1 and have played AC2 twice now, i dont know whether or not ACB is worth it. 

I am sceptical that the game is just one big DLC and is small and unworthy. But i have heard that its around the same. 

I dont mine mucking around doing my own thing then doing the story. For example in AC2 whether i have an mission before i would get all the towers in the area and if near my the latest assassins tomb. So basically dragged out my AC2 experience to around 20 hours which is decent. 

Will ACB offer that AC2 experience. I know that the overarching Story is F'ed and is terrible, i dont know why AC1 made sense but lost the plot at the end of AC2 and i expect ACB and the next installments to be just as terrible in the story department but i dont really care. 

oh and is the assassinations good 

ACB is as good as ACII.

It improves in just about every way over AC2 and it seems to be a bigger game than AC2 (especially when you factor in multiplayer)

have played the first three chapters(well sequences) and it just as good if not better than ACII, by looking at your sig I'm assuming you're getting the PS3 version at that comes with more content! and it's free!!!

though there are some bugs in the game, I killed a guard(slit his throat) and he saw on the ground rolling around, also another guard manage to flip in the air and his leg went slinky and grew like 10 feet(I'M NOT MAKING THIS UP!!!) and the final one is that I could burn a tower even though a killed the ruler over it(had to kill myself and redo it)

You played the previous games. You liked them. Logic dictates that you purchase what you enjoy.

Simple.