I'm not especially pleased. But, I'm sure that things will get better.
One problem that I've encountered relates to the icons (on the tool bar) for some of my extensions. When I touch the icon, such as 1Password, instead of getting an entire "window" for that extension appearing.... I get only about 10% of it popping up. So, I have to click it again.
I'm also getting some problems in YouTube. But, that could just be Google messing with YouTube again. I'm getting rather tired of their tweaks. Now, a video's sound keeps playing EVEN THOUGH I've moved to another screen within YouTube. It is as if they think I want to keep listening to the last video (the audio only) UNTIL I start playing the next video. How annoying. I have to go "back" and stop the video in order for the audio to quit.
Overall it seems to have some increased slowness or lag. Of course, I still get the temporary freezing within Chrome. You know... when you click on "bookmarks" (or something else) and Chrome freezes up for about 2 seconds. It also happens at other times, not just related to bookmarks.
Is Safari working out well? I moved away from Safari a long time ago because it was hogging SO much of my RAM.