Not by me, sadly. Jason at Dragonmount has read a later draft of the book (but not the final copy) and posted his impressions here. Obviously, Jason has a vested interest in the book and gives a lengthy disclaimer warning that he is biased (he did give Crossroads of Twilight a good review as well on release). However, his assessment that the book builds on the success of The Gathering Storm and remedies the biggest problems of that book (such as Mat's problematic characterisation) is nevertheless encouraging.
The book is published in just over a month's time.