I would hardly consider this the worst show on TV...That's a major overstatement  I can understand not everyone is going to like this show.  It's either something you will like and click with right away or dislike.  

Personally for me, I like the show mainly because Mary's character is so flawed.

I would recommend renting it 1st.  Season 1 starts out a little rough and it takes awhile for Mary to get into this role.  There are also a couple of really annoying supporting characters.  Also, Mary isn't a very likeable character, but it's part of her schtick and eventually if you stick with it you understand why.

As I said, it's a good show, but there are bad episodes here and there.  The highlight for me is seeing Mary McCormack.  She can be funny and also sexy in a subtle way.

I like this show alot.  Mary McCormack is awesome and Fred Weller is very good and funny as Marshall.  There are a few bad episodes this season though.