Vivaldi isn't new. It's been around for a while now. The browser war is pretty dull at this point. Edge, Firefox, and chrome aren't really doing anything different. So if you're looking for something a little bit different, or just really like chrome but want a little less Google in your life Vivaldi is here.
Vivaldi is based off Chromium so naturally it's a pretty familiar feeling. Most of your extensions will work just fine with it. I had no problems installing my usual addons of RES, Ublock, and BitWarden. They installed and work just fine. Vivaldi also just added a sync feature not that long ago as well in their 2.0 update. This lets you sync your settings from device. Nothing new for those who are use to Chrome, but still a nice feature
Vivaldi has a few neat features my favorite being the speed dial. Essentially it's just a quick way to your favorites. When you open a new tab rather than having to use your favorite bar it's inside of that new tab from the start. Makes it nice and easy to continue onward.
The speeds are to be expected since it's running off of chromium. It's quick and the UI is wonderful. You should check it out if you're trying to mix things up/trying to de-google yourself.