I returned my SB now today I will return SP4. I really like these devices but they are aggravating with crashing and battery issues. I tried SP3 last year and had hoped SP4 would be better this year. I will go to 2 devices Yoga 3 pro for only when I need to hook up and program equipment with windows and Ipad pro for emails, notes, and everything else. UAG makes a terrific case for ipad pro with a kickstand. ! device would have been nice but maybe next year. Thanks for all the help during my reacclimation to surface.