My X has just passed the 2-year mark. I have 100+ apps installed, use it for work, back up, accessing and managing private cloud etc - close to a power user. The Hungarian tech press described it as the perfect office device, and I fully agree. It has to have a factory reset about every 6-8 months in order to retain smooth performance, but that's mostly due to the flawed design of many apps that store information that should be 'Cache' as 'Data', thus clogging the memory, so that's not the fault of the X. I had cheap entry level smartphones first that became a nightmare to use in months, reset or not. Then I tasted Sony with an Xperia M which I loved but quickly outgrew, moving first to a Moto Atrix 4G, then a Samsung S4 Mini. When I learned about Samsung's annoyingly narrow-minded update policy the hard way, I abandoned the brand and returned to Sony, arriving to X, and hoping to use it for some more time. My biggest struggle is screen size - this 5" is just as much as I can manage single-handed, and that's a key feat for me. I recently tried XZ2 for about 10mins, and the single-handed experience was rather strained - thanks but no thanks.
