Super excited about the potential of it. Might be a gimmick that dies out in a few months but will be hugely useful when we have a more available, comfortable AR medium that's always on us (holding up phone won't cut it).
I've just updated the app (available in US only) and found that whilst it works, the scaling/sizing of the items is a little off at times. The plane detection is quite slow and buggy with items being able to hover through other objects despite being 'rooted' on the plane. Overall a 3* effort.
Amazon is squeezing every single supplier more, and more and more. Now it isn't enough to just list a product. Now this 'service' will be yet another charge item.
Making shopping decisions easier by letting me visualize everything from a vase to a tow truck is a pretty awesome experience. My son enjoyed seeing the toys by moving them around to see all sides!