I was a bit surprised at the lack of detail concerning the implementation, particularly the results, in the Lucas paper. After all the time spent deriving the system and the indepth explaination, I would have liked to get a slightly better feeling for how well the system worked.

Along these same lines, I also would have liked to have some more concrete examples of what applications this is commonly used.

I was also a bit surprised at how quickly the paper dismissed the idea of using segmentation to help results. However, upon further consideration, given the time that this paper is published, I think segmentation was no where near the performance that it is now (which is still by no means perfect).