Factions brings new stuff to the Guild Wars franchise while leaving it's predesecor high and dry.
But with all this great content Anet is now missing a big picture. An that is - all of the weakpoints in the first Guild Wars are just as apparent in this second addition.
The story is still terrible, the voice acting is still unconvincing, and the cutscenes are as bugy and glitchy as ever. An now these two worlds don't even mesh in any coheirent fashion, as the stroy does little if nothing to introduce new players to Tyria and visa versa.
But that isn't really why people played Guild Wars to begin with. So if you had reservations about the first Guild Wars, then you'll have the same problems with this addition.
However, if you can get past the bad things which make Guild Wars such a terrible RPG. Your still left with one incredibley successful MMO which boasts one of the best combat engines for any game of this type todate, aswell as an amazing GVG, PVP and AB (Alliance Battle) experience. Enjoy!