I thought it was good too. Smith was superb as per usual. One thing I was a little puzzled about was that it was being discussed on Vine's show on R2 the other day and unless I misheard it (which is possible as I was at work and not listening intently), there's been some criticism from locals about how they were portrayed. I didn't see any of that myself during the programme and if anything I felt that, outside of the guilty parties, the local community came across very well.
One other thing - I see that the nation's favourite celebrity parents the McCanns are said to be fuming about the passing references to their missing daughter. Here's a thing - this wasn't about them, the references weren't in any way negative, and in any case the reason for Karen Matthews plotting the fake kidnapping of Shannon was because she'd seen how much money had been raised in the wake of Maddie's disappearance so it's entirely relevant to make mention of it.