I personally LOVE this ship ( they are my favorite characters ) because well they are alike and Felix helped Kagami to be free of her mom and Kagami helps Felix socialise sooo I think they are great for each other ! Also Kagami not knowing how to socialise in the first times we see her , could understand Felix because she was like him at a moment in the series 

I know a lot f people who don't like this ship and I am fine with it I just want people to know my point of view