I’ve been using Arc as my main browser for about an entire year now, since it was in beta even. It’s far and away the best browsing experience out there right now and it’s not even close.
Their first mobile companion app for your phone was ok but they just put out a new one on the App Store called Arc Search, that’s so much fun to use. It’s only missing auto-fill and incognito mode, which the team has said are both coming soon.
The only thing I wish these two new browsers had was a WebKit version for each as Arc runs on Chromium which still uses a boatload of RAM. Other than that it’s a 9/10.