So far one of the best Total War games I ever played.
The Gameplay, like i said being very similar to Rome's, is still very good even though it has not changed that much over the years, although i would of liked to see an improvment of some sort.
The Graphics were not dramatically overhauled, they were basically "polished-up" with bloom and having no more "clone armys". Still, the graphics engine is the best i ever seen in any RTS.
The Sound, like the graphics, was polished-up a bit too. One of the noticable details was the advantage of supporting Sound Blaster X-Fi.
Overall, basicly being a clone of Rome, Medieval 2 does not leave a big mark in the Total War universe. Yet despite the downs, it really one of the best RTSs i ever played.