Product review (5 stars): Works great, perfect fit
Works great, perfect fit.  I highly recommend replacing the junk plastic brackets with these more sturdy metal versions.  As others have indicated, the instructions leave a bit to the imagination but once you figure it out, they go on really easily.  So far they've held up well.  Just make sure to get the version for the correct size wheels.  This one is for the small wheels.
NOTE:  There is no longer a need to purchase the T15 Torx screwdriver (as I did).  There is a converter in the box that lets you use a Philips head screwdriver for the torx screws.  I'm just glad I only spent $3 on the Torx screwdriver that I'll never use.