Editing this bit in. I see some here have been fine with them and if you are great because it's a great deal, I too looked at it but Im very wary of imports because of people I know who have had bad experiences with customs. To me, it's a bit of a risk, but I view it as taking a risk with £700 and didn't want to take it. To me it's like gambling £700. Rest is what I originally wrote.
Be warned, they're based in Hong Kong and ship from Hong Kong to my knowledge and the problem with that is, it'll go through customs who are likely to not only x Ray it, but could well open it. They are highly likely to retain it too and demand 20% VAT, adding £140 odd. Now you might be lucky, and get away with it but if you can, I'd cancel and buy the combo from John Lewis / Waitrose click and collect. Get a two year guarantee with it and the combo for less than a grand, 900 odd quid. I collected mine last Sunday,