yeh i agree. i had a feeling through the whole series that he was good, even after killing dumbeldore. im so glad it turned out the way it did, and im so glad that harry recognised he was such a hero. there would be very few people who would risk everything for the regret and resentment he had for Lily, even so many years after her death.
i knew that after all that time, all dumbeldore's wisdom, there had to be a reason for his trusting snape