It's a great show. The actors are good, the plots are exciting, the relationships between the characters are well developed.
The first season was very interesting and gave a lot of information, but the format (two episodes in one hour) was a little bit problematic. Seasons two and three were well developed - I got to know the characters better. The fourth season started out good, even though Matt's leaving was disappointing. Too bad that the show didn't get to run for a fifth season.
The cast is great: Barclay Hope and Nancy Anne Sakovich are amazing on that show. Very powerful preformances by Matt Frewer (who's also hilarious on that show) and Michael Moriarty.