MUCH better than Star Trek. It takes the Babylon 5/DS9 approach to the story, with a main arc interleaved with minor arcs that run for several episodes, and then one chapter in the story being told each episode. The quality of the acting is beyond superb, and there's a very realistic depiction of how human beings really behave in situations rather than how we'd like to think we do (as in Star Trek). It's a very dark tale, with no clearly defined morality as to who are the good guys etc. Virtually everybody does good and bad as events dictate, and the characters have frequent arguments because they don't live by the ideals they espouse. Even the main enemy of humanity, the Cylons, are just trying to find their own way to survive, with their own infighting and conflicts just as with the humans.
As with other posters above though, start at the beginning with the mini-series (note: That's not series 1 episode 1, which was later).