That looks pretty classy.
Me personally, I like the cart, able to hold all your stuff, but I would put another couple of boards on the top and bottom. I reckon after moving about, if there is any debris on the ground it might cause the cart to shake, and sure enough(its happened to me) if a tool falls down through the slats and jams against the wheel, it might toss the whole cart over.... well if you are in a hurry it might. hehehe but I think you get the jist of it.
looks good.