I signed up. A small notification was displayed in the middle of the page, which scrolled off the bottom of the browser viewport. Scrolling down didn't help because the notification window had a fixed position. I had to hide my bookmark toolbar to increase the size of the viewport.

You seem to use these notifications in several places. I expected that hitting the escape button would also close them, as well as clicking the "X" in the top right.

When searching for a domain, it doesn't let me use full stops. I'm sure you did this on purpose, but it doesn't feel natural/right. It's unexpected behaviour.

I'm sure if I transferred in a domain, I'd get access to a DNS management interface that I currently can't see. I'd want to see this before transferring in though. Maybe each account should come an example fake domain. "example.com" ?

I'd also want to be able to configure up my DNS on your servers before I start the transfer... Or at least have it automatically enabled once the transfer has completed.

I visited the email confirmation URL twice, and received two separate "Your email address has been confirmed" emails.

Hitting the "delete" button in the search input field should work. "backspace" works, but "delete" doesn't. If you're not going to let me enter certain characters in that field, like full stops, you should also prevent me from pasting them in.

I've just emailed you through your website about an XSS flaw