I remember Memory being okay. I enjoyed it well enough at the time. I've only watched it twice or so, though. As SM points out, it was very much from Dan's POV, and I did actually enjoy seeing that. I appreciated the whole Memory refresher too. I don't remember that being very well dented into my memory prior to release.
I think it was the analysis stuff where it did get a little dicey. Some of it was interesting, some of it was just "wot?"