Incredibly frustrating level up system!
Completing a quest is nothing no experience points or anything like that.
For instance you choose some alteratinon magic and hit the button for about 100 times you get a 1 point increase, (so if you intend to use it only in battles it would take forever to increase), but if you keep hitting the spell you can became a master in a couple of hours. but the funy thing is that the game wont be easier because your enemies are becoming stronger too.
But if you dont level up you wont find any descent waepon or armor.
for instance i am level 39 right now(with hard work of button pressing D,above 100 hours gameplay), and even the bandits are hanging out in deadric or glass armor so money is not a problem any more...
So its prety skrewd up, i dont what they where thinking this is not an online rpg. Its still a good game but if you play with a rpg you want to become as strong as possible, and the other big problem with the game that it is not a real rpg because it has only 1 ending.
Otherwise one of the best games i have ever played!