Just downloaded and spent yesterday setting Vivaldi up to my liking, in terms of appearance at least. So a VERY new user. I came from Edge, simply because I fancied a change - nothing wrong with Edge, I like it a lot, but still: a change is as good as a rest!
I had tried Vivaldi once previously, perhaps a year or so, and found the set up a bit too detailed so didn't persist for long, but this time I found it much easier and (so far) I'm very much liking what I find.
Calendar is good, all the basic stuff perfect, although I wish I could make the Speed Dial tiles still smaller: I set Tiny and they're not.....but it's no real problem. Next job on Monday is to sort out Mail (then I will have all I need on s single browser rather than a couple of separate things) and set up a Blog.
Happy days!