I use Arc daily, and I really enjoy it. Tabs are organized in a list like bookmarks within a standard browser, and as someone who often saves bookmarks but forgets to look back at them, Arc makes it feel like my tabs won't get forgotten since it'll pull up the tab when I type it up or something similar in the search bar. Easels are also one of my favorite features of Arc since I can save screenshots on a blank canvas, and those screenshots can link back to the site page I found it from if I ever need to get back to the source.
While I'm comfortable using Arc now, there is a learning curve in order to figure out where everything is and how to access it, so it got frustrating at times. Even I don't often use the mobile app because I'm still getting used to the layout, and there's still the missing feature of extensions and profiles not syncing across different computers. Learning keyboard commands makes a huge difference for me though, and I love how transparent the Arc team is with updates. I look forward to when the browser gets a little update notification, and I get to read up on what's new. They put up videos and tips on how to use Arc more efficiently, and I feel more invested with this browser because of how much the Arc team interacts with their community. I'm excited to see where Arc will go!