Your review: Probably better than other cheaper chrome shelves available online. I bought an extra shelf for lighter items up top. This shelf truck has handled the extra shelf and all the weight I've put on it with ease. I've got about 100 pounds of PA speakers on the bottom shelf, and other progressively lighter gear on the upper shelves. It's probably only working at half its weight capacity. The wheels move it around without any strain at all.
Pros: Strong, fairly easy to assemble. Worth the extra money if you want the reassurance it's not going to collapse on you.
Cons: A bit expensive with industrial shipping. If your going to stack very light items, it might not be worth the expense. Assembly instruction aren't all that clear, but once you understand how the shelves have been engineered, it's easy to assemble.