Extremely Good!
The graphics for Fallout 3 are great and fit right in with the theme of a world after the war.
Fallout 3 starts in a unique way, it starts during your characters birth. Its basic tutorials are done in the form of the achievements of a baby. Like when you are learning to walk it isn't just your first steps in the world, it is also the first steps of your character.
Right out of the vault you have lots of freedom. Though there is a trick travel, you can't actually use it until you go to the places. This means there is lots of things you will find on the way to other places. During this exploration you will come across many people and creatures who are trying to kill you, whether it be out of the need to survive or just plain blood-lust.
The towns in Fallout 3 are usually made of scrap metal and have no people that try to bring justice, instead there is good karma and bad karma, which are gained through various things. The game has lots of choices, in quest you have multiple ways of getting the rewards. Such as doing the quest, lying and killing.
The combat in Fallout 3 is fun, but most of the time you will be using V.A.T.S. as your guns seem to be less effective if you don't and on some occasions you will get to see a limb go flying.
Fallout 3 is well worth how much you pay and is just a fun game to play. The game has plenty of replay value after you finish it, as there will always be places to explore.