Advantages Casting spells, obviously. Nothing needs to be said about the ability to cast level 3-4 poison on an opponent. I don't know anyone that would not stop whatever they are doing to deal with their affliction.
Disadvantages Can only wear leather armor because of meditation.
Lack of weapons skills. You're pretty much done for when you run out of mana. Conclusion An incredible character. Can take any warrior-type and, when played right, will never lose. Next, get to 690 skill points ASAP and use the Skill Gain Stat Cap Method to get your stats to 100str 100 int.