I give two stars because I thought the first season was good but then like most shows, writers don't have a clue about how to keep it interesting and original and it starts to go downhill. Season 2 was still OK but you could see it starting to push it and by season 3 it had become another ridiculous super cop series, Stana literately become Beckett again. She became a one-woman army taking on all comers.
I can't stand shows like this where a woman takes out an entire army of highly trained soldiers who are not only well trained but battle hardened. I've seen this type of show too many times, female hero and males are just weak idiots who need saving.
I guess she is doing castle all over again with a different cast, not to mention she looks malnourished and dresses awful.
Reminds me of how the fast and the furious films evolved over time, Toretto started out as a car racer and thief to international super hero who fights highly trained criminal organizations, it's beyond ridiculous now.