The site looks good, clean and does a fair job however there's a ton you can add on (which may break its minimalness) like checking how many users are complaining about the side on twitter and maybe allow manual feedback.
Also, if you plan on building this further, get some tests in that package.
I like this. What I thought would be a good service is a third party statuspage. So often the first-party ones are inaccurate (or just plain lying). Historical data would be so great for choosing a provider.