I find Shutterfly WAY too expensive - having to pay for every additional page makes my annual 200 odd pages much, MUCH too dear. I thought about breaking my print run down to a number of books, but as shipping to Europe is on a per book basis, around $15 per book, sadly Shutterfly, despite their excellent quality, is not my go to printer anymore.
I now use Blurb, specifically because their pricing structure has extra pages charged in groups. I do find their 7x7 album just a touch too small, but due to the price, I can live with that. And as a little aside, European orders are printed in Europe so shipping costs & timings are lower.
Quality wise, I think Shutterfly has the slight edge, but it is only marginal, so price is my main driving factor.