It's hard to do sweet without being saccharine (which, apparently, is a problem with Kate's book), but I think this accomplished walking that line. If you need to have an antagonist to enjoy a movie, this probably isn't for you. The characters are all likable. This isn't trying to win awards, and it isn't accidentally going to accomplish that, but if your desires are watching an enjoyable film with characters that you'll like, this meets that criteria.