We know their sites are good, and we know the design is on point.
If you could have design as great as that, why would you not want to? Why would you choose to go at it along and potentially give the customer a hard and bad experience? Why would you give yourself the chance to lose business that could be easily gotten?
Now, do not get us misinterpreted. You can easily get business with a website that hurts our eyes. You could easily slap something up and throw it on the web. The fact that you threw it up on the web is important and is an amazing plus. We advise you to keep your website on the web, even if you do not want to get it upgraded and updated and looking nice. Why? People surf the web, so you may as well spend your time keeping it up, so you AT LEAST have a chance to get it seen.