For all the disappointments, there were many great accomplishments for the series.
1. The barrage of science and literary references made people look up classic literature and physics text references. For a television show, it stimulated thought "outside" the show itself. In certain respects, it re-educated some viewers with their long lost high school and college courses. In other respects, it opened up new areas of study, such as my own new, ancient Egyptology degree.
2. The series opened the door to full internet connection between the show runners, the episodes and the fans. The fan boards were the life blood of the show. At it appeared that TPTB did have a pulse of the fan base as the show went forward, including killing off the unpopular Nikki and Paolo.
3. It was one of the few shows to weather extremely long hiatus periods. Most formatted television shows would have died on the re-run vine if new episodes were missing for almost a year because of work stoppages.
4. The series did show case the performance of several fine actors. The scenes between Locke and Ben will be considered great performances in the future. The series will also propel the cast into new acting ventures.