The stats systems is extremely different from Oblivion. You can't max them out at all. I vaguely remember maxing out at most maybe 4 different "trees" of skills.
The game is pretty good. You can't really compare it to any game since it has a very different style. It is linear in the sense that there are "acts" that you must go through in order. The main story line within each act must be completed before moving on to the next one. It is not linear in the sense that there is a ton of sidequests that you may do and there are usually quite a few areas to explore in each act.
I suppose, it is somewhat similar to Neverwinter Night's campaign system
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