This movie is like marmite: you either LOVE it or you absolutely HATE it! I saw it, found it hilarious, over the top, funny, witty, with good acting and great sets. My best friend turned it off after 20 minutes as she couldn't take it.
In the end it all depends on what you expect a movie to be. If you want a (somewhat) serious rom-com with a believable enough story and characters that might (perhaps maybe) really exist with utterly romantic moments... then this is NOT the film for you. If you, however, love Austin Powers and bright colours, if you find caricatures funny and can take twists and turns, then this might be the film for you.
As for me, it's one of my favorite films of all time. When I'm under the weather or a little sad I put it on. It's so far away from reality and yet so funny, colourfull and witty, that it cheers me up every time I put it on. I love the sets and clothing! For me it's a 5 star. The office scene with Ewan talking about his socks staying up has me in stitches every single time!