Ok so my favorite part about the Z2 is definitely the fact that it has both an micro SD card slot and waterproofing. With out either of those it would be incomplete. Mircro SD cards are so powerful these days if i carry around an micro to SD adapter i can use it for my phone, tablet, camera, and computer! All the other features such as a good screen, camera and overall design are certainly awesome as well.
And as for dbrand there overall customer relations are awesome. I remember they made an improvement to the Nexus 4's line of skins and so they sold the original one at standard price and tossed in the newer one for free as well. They also do awesome things for MKBHD, and plenty of other stuff.