I got this cart primarily for a microwave and a toaster oven.  I put the toaster oven on the top since it puts out more heat and set the microwafe on the middle shelf.  Even with the weight of these two items, the cart seems to be sturdy enough to store more items on the bottom shelf.  I didn't attach the knife block or the towel rack since I don't need them for my application.  Assembly was pretty easy but I agree with other comments that written instructions with the pictures would be more helpful.