I've been away for a couple of years since I became a father of twins almost two years ago. So here is my experience with Smart Pots.
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Its been about three years now and they have been doing well. I try to water them more often but sometimes I don't get the chance. I grafted multiple varieties onto them and most of them have already fruited. They've been a little neglected by me lately and its getting colder so a lot of the leaves have fallen off and they have a lot of ripe and over ripe fruit have swelled up and split from the recent rains.
I haven't re-potted them so I don't know how the root-ball looks. I wish I had some recent pictures to post. Maybe next spring when they start to flush again.