This one came assembled right out of the box, it has good silicone legs that keeps it away from the bottom. This serves purpose of saving your kitchen sink from any dents or scratches that vessels may cause. I bought one that did not fit my front facing hole as it did not really matter to me but the edges are perfect and fitting is accurate. I thought stainless steel will be easier to clean compared to silicon mats but this one also becomes challenging to clean as food may stuck to the joins. Overall, happy with the purchase. I have been using it for almost 2 months and no sign of rust so far.