This is absolutely great. Very strong and heavy, but rolls well on casters (2 of which lock).  It wasn't particularly difficult to put together EXCEPT, as previous posters mentioned, the holes on the bottom shelf don't line up w/ the holes on the legs where the shelf is supposed to attach. However it fits down between the legs and is pretty secure just sitting there, so this isn't a hugeissue (they probably should just omit the holes and bolts for the shelf).