I use them and they work fine. The platform itself is not perfectly flat because of the SPD cleat, but that won't bother you for short to medium rides.

If you plan to use the bike for very long rides, as in 50-100 mile rides, then in that case I would recommend going with SPD-SL instead of SPD pedals. When you are in the saddle for 6 hours or more, the larger surface area of the SPD-SL cleat makes a difference. Of course you can also go with another road pedal system such as LOOK pedals.