BinaryCanary is dedicated to providing you with the best website monitoring service available. Why would you settle for 30 or 60 minute monitoring? If your website is valuable, then you should be monitoring it every minute - to ensure that if there is a problem, you will be alerted as early as possible
You only have one chance to interest a visitor - if that visitor sees that your site is down, they may never come back. With 1 minute monitoring, you'll be alerted right away of any failures in your website or other monitored service.