i have a 2014 x1 carbon. solid build, decent battery under linux(5hrs average load). probably will get an x1 next round too. dont get booged down with specs though. newest is outdated in a year, and if you don't get a new laptop every year, arguing specs is pretty moot. drawbacks - soldered on ram + it's a premium not super modular. positive - its solid and nicely designed with a great keyboard (and this is from an otherwise chicklet style hater, but really nice travel)