Those who tried them for the first time found the Wing Pro flat tops considerably more pleasant to use on long hilly rides than a handlebar with a round tube.
Their greater compliance also makes them a sound choice for sportifs and audax. They're made from AL2014 grade aluminium.
The drops are short so it's hard to avoid clouting the wrists when sprinting out of the saddle. They're measured outside to outside and the 46cm version is exactly that.