I've had one of these for about 9 months now, and I'm very happy with it. Battery life is really, really good. The CPU is plenty for any task I throw at it. Trackpad, keyboard, etc are all good too. Sound is good enough for listening to music or watching a film.
The high-res display is very good, although 1920x1080 on a 15" display means that things often look small. Windows can increase font sizes by 25 or 50%, but this can mess up some other things, and graphics often don't look good when increased in size.
Only issue I've had is a bug with the display brightness - switching on from Standby, it occasionally gets stuck on 100% brightness, requiring a reboot, which is frustrating.
Final point: upgrading hard drive is not actually that difficult. I found a YouTube video that told me what to do. It just requires patience and a gentle touch.
All in all, very happy with this laptop. Recommended.