Not a bad deal. New iPad Air 32gb with 4G is $579 from apple. About $150 savings and only 16 or 32 available. And buying a refurb direct through apple is about $100 more expensive on all sizes, but AT&T only. This us a great deal.
I got one of these the last time they were offered, and I love it. I got the 128GB model and it has been great so far. Verizon did have a little bit of trouble setting it up on their network, but they got it worked out in the end.