Pro's - great setting, beautiful sparkle under incandescent & halogen lighting, nice attention to detail, can definitely be used as a temporary set.  A personal Con - The Asscher cut is really large, the stone is approx. 1/4 inches wide, which is a little gaudy for my taste. But me & my fiancee are exploring different settings and it can definitely serve its purpose as a temporary, until we find the perfect diamond engagement set.