True, following mysterious events in Roswell is no new subject. However, aliens that are basically human in everything but their blood type that allows them the abilities even most superheroes would envy. The only three downfalls of the series all together, were #1: They did not learn 95% of their powers until the second season and #2: local tv shows don't usually rake in enough dough for special effects, so they can't really use the powers at full force until season 3 which leads to #3: season 3 was given to the crudiest producers ever, UPN20 (instead of its original WB39). UPN destroyed and mutilated every chance this show had of making a fourth season.
yes, the music has changed a bit, but if you actually bought the set and did not download it illegally or copy a friend's, you can read the memo that states "if the music was not changed, it never would have been released." I admit, the music changes drastically effect some episodes, and 99% of the new music sounds like the exact same band from a garage with the doors shut and no real sound equipment. But I would rather have the set and not worry about it.
As far as the first season being the worst, it's not true, the third was the worst (it was the x-files on crack). The only real bad thing about the first is the fact that it took 26 episodes for them to form a cool group of central characters. the whole "trying to keep it secret" thing was suspensful, but also extreemly anoying.