I am not entirely sure why the reviews for this movie are mostly bad.
Along side Kate's(the protagonist) endearing personality, the mild tackles at some of the issues in the UK, the wholesome funny family/friend situations and lastly the message that delivered, This movie was a roller-coaster of laughter and tears for me. I suppose there are few ends missing, but rather than focusing on the hows and whys, simply accepting whats happening will hit you like an emotional truck. My advice to you if you are about to watch this film, is to try and not question whilst watching, it may ruin your experience if you do. It's a quirky, lighthearted comedy and has somewhat a happy-sad ending. It was thoroughly enjoyable and I would recommend seeing the movie.