I wish I was able to use the website to sign up. I spent half an hour on their signup flow entering all the fiddly numbers, then got an email saying for some integrity reason my order was cancelled and there was nothing they could do.

I called support and they said the website just didn't like me and I had to sign up by phone, loosing the significant online signup discount. So I spent the next hour and a half repeatedly spelling things out with a phonetic alphabet to someone who only understood a specific kind of formal English before I gave up.