Upgraded from a Galaxy Watch 4 - what a difference! It easily lasts two days or more, charges quickly, the screen is beautiful, and the heart rate monitoring seems perfectly fine so far. Moreover, it's comfortable on my wrist, even with the standard strap, which unfortunately isn't the case with other smartwatches (my wrists are super small). The straps are easy to change and really change the look of the smartwatch. Plus, I like the idea that it's easier to repair (I've never damaged my watch in the past few years, so being able to replace the battery means a lot).
Downside: If you don't have a Pixel smartphone, some things don't sync, such as Do Not Disturb mode, sleep mode, and even the alarm clock (installing the Google Clock app on your phone doesn't help, unfortunately).