This cart is SOLID! I have a metalsmithing studio and I needed something that would be secure enough for my vise, rolling mill, etc but mobile so it could be moved out of the way if not needed for a class. This fits the bill. The locking wheels are boss- my husband is a decently sized dude and he could just barely get it to move (on the carpet no less) with all his weight behind it. 
This is one of the last pieces needed for my studio renovation and it is the perfect size and it was easy to assemble to boot!