Overall, this platform is sturdy and unobtrusive.  It seems to be doing its job well and has enough room underneath for me to store extra boxes that I want to keep out of the way.

Only complaints were on assembly.  The instructions were not as clear as they could have been about the orientation of the side rails and I ended up putting on backward the first time.  Additionally, the bolts that hold the outside of the frame together were extremely difficult to screw in.  I ended up stripping the hex key hole on the bolts and buying a couple of replacement bolts at the hardware store (fortunately, they are a standard size bolt and were easy to get).

Bottom line: once assembled, the platform is great, but assembly was more difficult than expected.