Chiming in from a USA user. Their webmail and suite run slow in the USA. Once it loads the page initially though, it uses localstorage.
However, back when I used them less than a year ago, they had random periods where the websuite did not load.
Finally, they have a really bad 2fa implementation that is not documented and I had to search Reddit to figure out how to log in.
Check Bleeping Computer. They’ve been smashing many Windows.