My keyboard seems to be perfect when typing on it, people that have used it as well have commented on how good it is, havent needed to alter a thing.
My theory on this one may be that it is actually you just trying to get used to the keyboard, there is no way you can say that when you are typing you dont make errors or miss keys, everybody does.
IMHO I would just keep typing with it and get used to it, maybe also alter how you are typing with it, desk height, chair and possibly also look in System Preferences-->Keyboard & Mouse to see if there are any settings in there that are related to your problem.
If you really think after a while there is a hardware problem with the keyboard take it to a genius at an Apple Store and let them check it out.