Product review (4 stars): Didn't take much work to get it installed. There ...
Didn't take much work to get it installed.  There are a couple minor drawbacks.  It's only all the way up or all the way down, not different levels of height, but that'st not big.  Also, the wheels are a little loose on their axles, but again,not a big deal.  All things that don't make it a problem.  But having something where the wheels don't come of the posts each time you pull the top tray out is well worth it.