I have wheelsets built up with escape rims between me and my wife... all of them are holding up very well (three are used for cross racing). I personally think they are stronger than Mavic Reflex rims, and they sure are lighter.

Two sets are built 28 hole front and rear, radial front, 3xds/2x nds with DT Supercomps

Two sets are built 32 hole f/r 3x all around with DT Revs