I'm not an iPad person. Even the mini is too big to be portable (which I define as fitting in my pocket). For tasks where I need the screen real estate in happy with a laptop or even a desktop, and cloud syncing makes this all very viable as is.
Many will disagree with me, though I see thenioad as being used mostly as a media consumption device. I often hear people say their videos and web pages are nicer on a larger screen. 6s plus is plenty big for all of those things. For movies I have a tv. For spreadsheets I have a notebook (but can still edit on a 6s plus in a pinch). That's just me though.
We last week sold our mini. Hardly used it. Had it since the Christmas of launch and the most use I got out of it was printing coupons (lol).