I finished the game last week with a little over 50 hours. The only achievements I didn't get are the treasure chest one and the immortal's skill master ones (really didn't feel like going around trying to find the 8 seeds I missed...they could have been anywhere).
Overall I thought the game was excellent. The story kept me interested, the novel parts were well written and just long enough to keep my attention, and I even enjoyed the old school battle system. It would have been nice if there were a skill or accessory to stop random battles when you wanted to backtrack to old areas to find missed treasure and such, but that's one of the only complaints I have.
Hopefully a sequel will be made. They could just jump ahead another thousand years or something...:)