Hello PJinOH, Thank you for your review. We are very sorry to learn that you were not completely satisfied with the design of the sink. As a leading manufacturer for baths sinks and vanity tops for the last 25 years, we have removed the overflow holes because it creates the opportunity for unwanted bacteria in the bathroom. Most overflows are designed so that they cannot be cleaned and, over time, will develop mold and mildew that usually will require the homeowner to change out their basin. With thousands of tops/sinks sold in the market today, our customers love not having the overflow/mildew issues. We can assure that all of our sinks are IAPMO Approved to meet or exceed the national plumbing code. We would like you to know that we truly value your feedback and look forward to using your review as a guide towards actively improving our products and customer experience. Best Regards.