I've watched season 2, 3, and half of 4 so far, and this is a really great show. I liked it when it first started but I lost track of the story pretty early and never got back into it until now. I love the long continuing story arcs much better than the isolated episodes from the original and Next Generation. The character development is superb, and you just can't beat all-out war with the dominion. The only unknown for me is Enterprise. I haven't seen even a single episode, so I don't know how good it is. But as a huge fan of ST and ST:NG, I have to say that DS9 is better.