sporkwrote a review of Giro Factor Shoes on December 7, 2011
these are probably the best fitting (for my foot shape) and most comfortable cycling shoes i have owned (various sidi, northwave, and specialized). but, they are severely lacking in durability.
as others have mentioned, the heel pads are very small, not replaceable, and wear out rather quickly.
the microfibre taijin upper is supple and holds your foot well, but easily scuffs/rubs away with surprisingly little friction, leaving your rather pricey shoes looking cheap and abused. (a bit of clear chainstay protector strategically placed on the toe/heel might help)
for those riding the red or white versions, the mesh inserts in the toe box hold dirt well and are hard to really get clean.
if i find them on sale for under $200, i would consider buying them again; otherwise, for a bit more money upfront, i am going back to sidi (which will last years, versus a single season with these).