I thought it was funny, although I admit I did borrow it from a friend and might have thought differently if I'd paid money for it. It was quite short, but I enjoyed for once an adventure in a modern setting with no fantasy or magic, plus some humour and romance. It was sweet.
I guess you won't be buying Runaway 2. :D
I agree about the Broken Sword ones, but 1 and 2 are quite old. I recommend buying 3 first, and if you find you like the characters, get 1 and 2 and learn the backstory.