Despite the law of diminishing returns, I was actually looking forward to seeing this film, because a few years have passed since the original film's release, suggesting that more care had been taken with it than is usually the case with sequels. Also, the original stars were back, and it has Lara Flynn Boyle in it, so it's worth seeing just for her.
Will Smith has said that one of the reasons for it's delay is that they kept altering and improving on the script. If this is the case I can only imagine what the original was like, because the story itself is weak and disappointingly dosen't follow up many of the threads from the original. That said, there are more hits than misses here and like the original it does end on an inspired note.
Overall, likeable but forgettable and a minor disappointment. 5/10