Been daily driving it since it came out on my 14 Pro Max and so far iOS 17 Dev Beta 1 is overall pretty rock solid for me, battery life is roughly the same as before, all the apps that I use daily work just fine though I did have to reinstall paypal as it was unstable at first, it opened ok but tapping something inside would cause it to crash the app. I reinstalled that app and it's now rock solid.
Apart from crossfade causing the music settings to crash which seems to happen to everyone so that's should be fixed in the next few updates I hope as it's easy to reproduce. I have had no issues, even carplay using my 3rd party wireless adapter is working just fine.
Been daily driving Watch OS 10 as well on my ultra and apart from the home app not showing my temperature/humidity sensors (page is blank on the watch, iPhone shows them fine) which is annoying everything else is running very smoothly. Battery life on that is also on par with OS 9 at least for me, been 18hrs and I'm down from 100% to 74% which is very close to what it was before.
I upgraded mainly to be able to share the AirTags and that works great. For a first dev beta it's really good. Haven't tried SMS through iMessage so can't say if I have it, may have though as it seems to be a common bug, but I don't have anyone to send an SMS to so it doesn't affect me, as long as they come in which they do I'm fine until that bug is fixed.