I recently purchased one of these from a charity shop for £40 with two lenses.
As mentioned in another review, the autofocus is rubbish and as for predictive AF, forget it. You will be lucky if it focuses on a still object.
Having said that, it does take superb quality and very detailed pictures ( the lens is it's best feature).
I took 92 pictures and not one was out of focus but this is because i was very patient and took my time and waited for the ' In Focus' light to come on in the view finder.
If you can pick one up for pennies, get one. Just don't expect modern standards or spec.