I have a 1+13, basically replacing my 13 Pro, and I like most everything, save the camera.
The camera is just perplexing to me, like I can take a picture of the moon, handheld, AI zoom, be impressed as I can see craters, but then other times, I get frustrated with how it handles macro or what trees or objects in the distance look like, as in I question if the lenses are decentered.
The AI reflection eraser has been handy a few times. I've also bought ProShot, and according to the developer, because of how Oneplus handles the camera API, it's not as easy to code for their phones.
The rest is what I wish Apple was trying, the big silicon carbon battery, fast charging, better RAM/storage for the price. The screen is really nice too, with the improved HDR modes. Android Auto and Maps are nice, although I miss how colorful CarPlay is.