I have (semi-daily) and would say it’s somewhat close to being day to day usable. They recently added Safari-style back and forth gestures and you can choose to arrange your tabs vertically (though not in a tree).
The main thing preventing daily driving is that it’s not in the App Store yet, leading to it not being selectable as a default browser. I also experience occasional crashes with hundreds of tabs open.
The main thing preventing daily driving is that it’s not in the App Store yet, leading to it not being selectable as a default browser. I also experience occasional crashes with hundreds of tabs open.