I like the cut-outs at the leading/trailing edges. makes it easier to fasten Rock Straps ( or what have you) to the rack.

I have the Bike MP3 rack myself; and they welded some "Tits" that protrude underneath (two on each side) which are absolutely worthless; since a cinched load on the rack will eventually (possibly but likely) require more tension adjustment while riding. The "Tits" by design are a unreliable tie-off point. A upside down cleat would've been better...