I really liked that show( and I think it just ended too early). Well, I've only seen seasons three and four, but I became pretty mad about the whole series and especially about Barbara Griffin.I think she acted Marion exactly the way lots of people wanted to see her : Strong and funny but also with dreams of a normal life with family. She acted just great in every episode I saw. Admittedly the storys were a little too fantastic sometimes, but it was great fun to imagine what could come next. The only thing I sometimes hated was the relationship between Robin and Marion, because it was different every episode. One episode they kiss and in the next one , they're just good friends - I was pretty confused about that...
But all in all there's nothing else to say (at least for me) than: I just love it!