I have rehabbed and remodeled many houses. Some on the cheap for a flip and some higher end for homeowner clients. We ordered these because they were porcelain and advertised as being able to be used on a counter, under a counter or wall hung on their own. We couldn't use them as a vessel sink above counter. Laid on a flat surface these sinks wobbled. Same issue with under mounting them. Although the top edge of the sink was the most even surface. We then went to hang them off the wall. No hardware came with it so to use it as a wall hung sink we had to find then customize mounting brackets to it. But once hung one of the sinks seemed to be angled downward while another was skewed to the left. Even though both the back sides of the sinks were pressed FLAT against the wall.