I would agree with vierasniper.
If you like the Elderscroll games, Skyrim is a must have.
If you do not like them, or the open world RPG style of play they have ... well .. you may not be that impressed.
I love the combat system so far too.
Although Im not really that far into the game yet, about 4hrs or so, I can see this game being a huge time sink.
I mean, I haven't really done much of anything in terms of main quest.
Mostly just wander around exploring, went into some mines, harvested a bunch of plants and mined some ore. (still havent got to crafting yet)
Killed somes wolves, bandits, and .... a bunny rabbit
From what Ive seen so far, the game really is excellent.
But, In all fairness Im not far enough in to get a good idea. But my initial impression is that it look very pretty, runs very well, and is a lot of fun.
No crashes, freezes, or stuttering thus far.
In regards to performance:
With my system, it determined High Settings was appropriate @ 1080P and x8AA x8AF.
I left it at its recommended settings, with the exception of going to x4AA and x16 AF. No performance issues thus far. And best of all, no engine stutter that Ive encountered just yet as was in Oblivion.
I did find it odd, my GPU only runs at about 50% use, and my Quad Core CPu is showing approx 75% use across all 4 cores evenly.
According to eVGA Precision ingame, it says its rendering in DX9.
I keep forgetting to take screenshots, but here a couple: