It seems an odd thing to ask, but my initial impressions aren't good
First of all, I just wanted screenshots and finding them was a chore. When I did find some, they're all based on the desktop experience. Part of the issue was because when I clicked sign in on the website and didn't sign in and the only way to go back was to clear cookies.
Secondly, during the sign up, some of the stuff wouldn't fit in my mobile browser, forcing me to scroll, if the page would even scroll. And this harkens back to the age old question, why is Mozilla so bad at web design? Maybe I'm articulating the question wrong, but it's like bugzilla, mobile is an afterthought, hence so many pages being desktop only, Planet Mozilla hasn't even tried for a mobile layout. I understand that Mozilla is a big company and works by the numbers, but those same people at their work computers that you're obsessed about have phones and tablets that they use outside of work.
So when I was looking for an email alias solution, the one that looked the best was Addy.io. it has screenshots of an app, already much better. Mozilla where is the Firefox Relay app? Oh that's right, there isn't one. And honestly, if not for me wanting to support Firefox, I would've gone straight for Addy.io.
I even checked the Thunderbird Pro news, only to find out they weren't going to offer the service, even though it makes a tonne of sense logically, but also don't compete with Firefox for revenue makes sense too
Anyway, the reason I'm asking is because I feel that the experience should be better and while I want to support Firefox financially, I don't want them to think a half arsed experience is good enough. So, does it suck or is it just me?