I've had an issue with the SP3, SP2, Surface RT and Surface 2. I've owned and used them all. It is the sudden movement of the cursor, it might be to another application, it might wipe out a passage or text or the cursor may simply reappear somewhere else in the passage of text. It is very annoying. This happens when using the type cover which is pretty well all I use. A reference point is a MacBook where this never happens whether it is the keyboard or whether Apple have looked at this issue, it just doesn't happen. I'd be interested in what other people think. Personally I think that this is fixable in software and Microsoft should fix it as it would improve the usability of the SP3.