I've been using the Nothing Phone 1 for about 4 months now, and it has been the best Android smartphone I've used so far. To be honest, since the upgrade to Nothing OS 1.5.3, based on Android 13, I've seen a marked improvement in my user experience.
The only changes I made to how the Nothing Phone 1 comes out of the box, is that I prefer to use the Discreet Launcher and Jugo icon pack. Other than that, I don't make any more changes.
One of the things I like the most about the Nothing Phone 1, is that it doesn't come with much bloatware. Other than the custom launcher it comes with, and a couple of apps like a weather and Bluetooth paring apps, it is as close to vanilla Android as it comes.
So far, all my coworkers that have seen it have liked the design of the Nothing Phone 1 so far. Some like it because it reminds them of an iPhone without being a copy of it. I can see how, and I don't mind it since I like the iPhone industrial design while I prefer using Android over iOS.
I use my Nothing Phone 1 on Movistar network in Mexico, and so far it has worked like a charm. Since about January, Movistar has started to roll it's 5G network in Guadalajara, and where 5G is available I've been able to use it with no issues at all.
I do recommend the Nothing Phone 1, just make sure its compatible with your mobile provider network before buying it.