I really don't like how there is a long lever effect on the rack. Even with minimal weight I think the flexing it will take on the trail will cause it to crack near the welds/lever point in a short amount of time.
There is a similar rack that is made for the XR650R, this one uses three support legs and suffers the same problem. I've read numerous posts where this rack has cracked since it is levered and not supported on all corners. The WRR version is even worse!
Here's a pic of the XR650R E-bay rack.
Im my opinion the E-bay WRR rack or the one pictured is a poor design and will leave you without a rack when you need it most, miles from home. But you know what they say opinions are worth
Hodakaguy