The rail itself seemed a bit flimsy, the connector piece that connects the two rails in the center is not sturdy enough and very tough to align and visually look correct.  The rubber door stops that go on the rail did not slide onto the rail without using a rubber hammer and thus are so tight, scratch the rail so I did not use them.  Overall, very shoddy quality.  The best and most well made parts are the casters and wheel assembly.