It does look lovely but as an established GM I am not sure I will bother. Books 1-3 would see little use. Book 4 might be more useful but our game has us about a year on from the standard 1625 start and these scenarios may be a little too basic (or in the past) for us. The pre-gens would see little use and I have more than enough dice.
BTW - adding dice means in the UK, as I understand it, that the box will attract 20% VAT that books do not.