I've had this for a few weeks, so far so good. Paired up with the default options that Amazon recommends, "customers who bought this also bought":Crucial 32GB Kit (16GBx2) DDR4 2133 MT/s (PC4-17000) SODIMM 260-Pin Memory - CT2K16G4SFD8213Samsung 850 EVO - 500GB - M.2 SATA III Internal SSD (MZ-N5E500BW)and installed a windows 10 pro license from kinguin. I'm a ruby developer, I would normally stick to apple products but wanted to try something different this time. My desk had a 4k 27inch screen, and this tiny little machine could drive it at 60hz, sold!COST: As far as cost-efficiency goes, it feels like you're paying a lot extra for the compactness of this device, but that's just not true. If you try to find a case+power supply+motherboard+graphics card+CPU combination that can do 4k@60hz over HDMI 2.0, it's pretty hard at this price and especially hard at this power efficiency.As I began to use this for developing code, I used a virtualBox powered Hackintosh as a crutch to get started, slowly figured out how to setup my environment in Windows and got rid of the VM.PERFORMANCE: This little machine can sail through typical dev tasks, handles my editors, tools and IDEs very well and builds the project in the blink of an eye! I'm not much of a gamer, but do enjoy the occasional FIFA game or two. This machine handles very well with fifa17@1080p, so that's a nice little extra :) Boots up Windows in less than 10 seconds for a quick start.CONS: The other reviews about noise might be true, you can hear the fans when playing a game or doing intense tasks. But I don't find it louder than any typical laptop.