Despite being a better choice due to shiny pack, I find it much cheaper to just buy normal boxes... on ebay, you can find both types at around the same price, even if full box has 2x more stickers... Also, a UK full box can be up to half the price paid in stores (price per sticker).Already opened the six box breaker and here the result.
254 doubles. I have a lot of shinies and 9xValencia emblem
Also I have swapped with one friend (the only in my country) and got 51 new stickers.
Here you can see my stack of doubles.
Don't mind the shinies so much here, as I can easily order them later from Topps.