Dig Into iOS 13 Beta Feedback
It might be a good idea to hold off on a download until you've dug into the feedback from iOS 13 beta users.
Older devices typically have the most trouble moving to new software. So if you own an iPhone 6s or iPhone 6s Plus, you might want to hang back for a bit and see what's what.
If your phone is currently running an older version of iOS and that version of iOS is performing well, you'll really want to dig in.
Once you move to the iOS 13 beta you can't go back to anything older than iOS 12.4. Apple's closed off the downgrade paths to older versions of iOS so that's why you need to have one hundred percent confidence in the move.
This is why we recommend digging into feedback from people using iOS 13 beta on your specific device. This feedback will help you learn about the iOS 13 beta's potential benefits and problems.
You can find feedback about iOS 13 beta's performance on this thread, Apple's forums, and social media sites like YouTube and Twitter.