I've been extremely impressed so far with the Xperia 1, every element has been a pleasant experience and is one of the most enjoyable phones I've owned to use.
There are a couple of downsides to the form factor, it doesn't always fit into every pocket and you certainly know if you've got it on you or not. And the lack of headphone jack is somewhat annoying, although that's mainly down to the fact that my car only has a cabled connection rather than Bluetooth.
When it comes to using the phone, I've found the battery life to be excellent, I've yet to kill the phone before the end of the day and usually have well over 50% left when putting on to charge in the evening.
The camera is also very good, with some excellent shots being produced and the flexibility of the multi camera system is inspiring, making me want to take pictures with my phone again, rather than my DSLR. Having a physical shutter button also helps with the feeling that this is a proper camera. The default app is good but has too much functionality hidden away and it isn't obvious always how to get at things. I prefer shooting in manual but have not been too dissatisfied with the auto results. The inability to save Raw files in the default app is also as a disappointment.
The screen is fantastic and watching any video on it is a pleasure. The colours of very good and the tone looks natural and balanced. The speakers are fine enough but you need headphones for proper enjoyment. I can't say that watching non 21:9 footage bothers me, you quickly don't notice the black bars either side and with no notch of in-display camera means you are able to enjoy full screen video without distraction.
The only minor gripes are the finger print sensor only really works with the right hand thumb, and without a case it is quite slippy.
I would absolutely recommend this phone to anyone, it's quick, there isn't too much bloatware, it's already been updated to Android 10, has one of the best multimedia experiences on any phone I've used in a long time and has a camera that can get really good shots in almost any condition.