I’ve had three — a Mk 1, an Air, and now a 9.7" Pro. I loved them all. In many ways the Air was perfect, and the only thing that made me buy the Pro was the desire to move to 128 Gb storage (so I could download and watch several movies on longhaul flights). Not many people will do that; and I’m not completely sure that I’ve ever used that much of the extra storage.
And they’re expensive! I don’t know what the situation is in the US, but here in the UK several supermarkets have launched their own branded tablets (Android-based) at very low prices and they’re picking up the ‘leanback’ crowd.