The console versions have major bugs of slowdown, because the game design/GameBryo engine is flawed. Every single thing you do, "Take Basket - Drop Basket etc." is saved into the code instead of being rewritten so the more you do the more it accrues into a pestering pile of shitcode.
There should be patches coming out left and right to fix them, but the PC patches just broke the fucking thing, dragons flying backwards, Whiterun suddenly ascdended about to the height of the tallest mountain, NPCs stopped reacting. But I played enough to say it's easily one of the best games I've ever played.