My dc, as it happens, are thriving. They love the clearly defined goals and the very specific feedback. But then their school is not putting them under pressure. Yes, the revision is intense, and to the exclusion of most other learning, but the teachers are clear that the SATs test the teachers, not the children. There is not talk about passing or failing, only about doing your best. And there is plenty of talk about the fun that will be had after SATs week.
(I still hate the SATs for what they turn Y6 into.)