Overall good product. Just beware of a couple of things: 
1. Like others mentioned, it is difficult to push the desk downwards- it takes your body weight and you have to remove everything from the desk to actually push it.  
2. Also, I wasn't able to get a straight forward answer, but it appears the metal piece of the stand has some lubricant on it (maybe to prevent it getting stuck when adjusting). It shipped and just looked greasy, but the replacement had the same issue, must be WD-40 or something.