Several of the reviewers on Amazon gave the 15r a 3-4 star rating for some of the dumbest reasons, such as it was made in India (boo-hoo), the security label on the box was scratched. Sounds more like they tried to find reasons to return it. As if the iPhone or any big name premium Android phone is perfect. I had to exchange my iPhone 13 for a dim screen at Best Buy.
My experience has been the total opposite and it's tough to complain when those buyers could have gotten the phone for basically $599. That's just $100 more than the launch of the Pixel 9a and possibly the 10a, though we are waiting for a price confirmation from Google on Weds, the 18th when it launches.
That said, the 15r is a massively better phone in almost every way. On my Pixel 9a, I can watch the battery percentage drop 2% in 5 minutes. It takes about an hour and 15 minutes for my 15r to go from 80% to around 76%.
As a side note, i'm liking one of the features of OxygenOS where you can pin an app page on the screen and you can move it around. It make it handy if you need to get back to a page you were previously using.