I couldn't finish Harry Potter. It read to me like an amateur college project: it wasn't story telling, it was paint-by-number narration. It goes to show that if you tap into the right market at the right time then you're going to make a buck or two regardless of any skill or talent. With Harry Potter the first book was tightly edited, but they got progressively worse; the last ones were subject to fame and the publishers let the pace drop massively.
If you're into stuff like this, you can read the full review.