Being an owner of the original Xperia Z, the Z2 is absolutely amazing. It fixes all the problems that plagued the Z and Z1 without getting rid of what made the phones great. I love the fact that there is not a flap for the headphone jack, and is now waterproof (my flap rubber has been stretched from being caught on my pant's pocket whilst putting it away). Also including a screen that does not suffer from colour shift.
Its fantasic that dbrand helped out with providing the Z2 AND an awesome custom skin for it.