If you're a bike commuter looking for a shoe you can ride in and wear around a casual office, this is a great shoe.  I've got a 30 mile round trip commute in the Boston area and I've been very impressed with this shoe.  I've used it for about 360 miles of winter riding so far and they are very solid.  As a pedal platform, they are fairly stiff.

I've used them comfortably down to 13F coupled with thick socks, chemical warmers, and Planet Bike toe covers.  The shoes are well-ventilated via mesh uppers, so they are not water proof or water resistant.  Without the covers I don't think they would very comfortable much below 50F.  I bought size 45 so I would have room in the shoe for the thicker socks and warmers.  I normally wear size 43.

My coworkers, used to my more standard bike shoes (Diadora MTB shoes) were surprised that these were bike shoes.  Several asked if I had retrofitted regular shoes.  They are comfortable enough to walk around in and the cleats (yes, you have buy them separately) are recessed enough that you don't sound like you're wearing tap shoes.

I'm very happy with the SH-MT33L shoes.  I would buy them again and recommend them to a friend without hesitation.