Okay, so I watched this show for Mark Shera. I admit it. I first saw him on SWAT, and had no idea he moved on to this series after that one was cancelled until a year or two after this one ended.
I thought JR was a better role for him than Luka, though both characters had some depth to them.
I liked JR's chemistry with Betty. No romance there, but that's fine. I didn't expect one. They just played off each other very well.
As for the series as a whole. I think the show was more interesting when Mark joined the cast. Perhaps that's a biased viewpoint, I don't know. But I think the show definitely attracted a younger crowd when Mark joined it.
I'd love for this to be on DVD. I spotted an episode on TV Land a year or so ago, but that was a one-off. Haven't seen any since.