B5 is indeed one of the best scifi series ever. As said before, season 1 is a little slow but starting with season 2 it ramps up very nicely to culminate in a great season 3 and 4, with season 5 stil, highly enjoyable. Very strong story.
Up until the remake (ok, 're-imaginining') of Battlestar Galactica, it was my favorite scifi series.
