I have surface pro3 i7 256gb version and im very happy with the unit. however i noticed with my keyboard attach to the unit and in portrait mode when i restart from windows, i will get stuck on surface pro logo and won't boot .. i will have to force power off and power on again to boot again .. without the keyboard attached in portrait mode or landscape mode with keyboard still attach to it.. it will restart just fine .. Im not sure if this is a bug or just my unit that has a problem.. Please can someone try to restart windows with keyboard attach to the unit in portrait mode and let me know? I would really appreciate it .. Thanks..