Engadget 19Aug review titled : Sony Xperia Z Ultra review: the best phone you'll probably never buy
WRAPUP :
Just like we saw with the Samsung Galaxy Mega, your decision to purchase the Xperia Z Ultra depends mostly on its size. The Z Ultra doesn't offer any unique traits that would make people want to deal with its massive frame if they don't want to, and the price is going to scare off shoppers who are on the fence. For those dead-set on a larger smartphone, however, this is definitely the best 6-plus-inch device you can buy. Sony designed a sleek and good-looking handset with a few tablet tendencies, and you'll absolutely love the display and over-the-top processing power contained within its chassis. Without a doubt, its size and price are the two most critical factors, and you've probably already made up your mind without even using it. In short, your decision to buy (or not buy) the Z Ultra should be a quick one: you'll either love it or hate it, but you won't stay neutral for long.

http://www.engadget.com/2013/08/19/sony-xp...z-ultra-review/