We were having problems connecting to http://mygopigo.com after switching wifi networks, I think due to dns caching in the browser, OS, or router. It is nice that http://mygopigo.com connects to 220.127.116.11 and explains your mistake if you are just connected to the internet, but that gets cached and doesn’t always get invalidated when switching back to the gopigo network.
Now we just use 10.10.10.10 and it always works. I understand some people won’t recognize an ip address as a url but you might want to simply say mygopigo.com OR 10.10.10.10 in your official instructions. Or you could set up a dns entry for some subdomain like direct.mygopigo.com that always points to 10.10.10.10 and then in your instructions say mygopigo.com or direct.mygopigo.com - one of which should always connect to something.