I will wait for the official 13.0 release and update on launch day (2 days from today). If it's laggy and buggy like the Public Beta 1 that i tested for a day before i went back to iOS 12 because i couldn't deal with that mess, i will install the 13.1 Public Beta straight away. Hopefully that one patches some stuff.
Been using the 13 GM on two devices since the 10th and have had zero problems. I'd ignore the "reviews". People just complain for the sake of complaining. It's actually a massive improvement over 12, just the swipe keyboard and dark mode alone is worth it. I've experienced no battery drains, no overheating, no instability whatsoever. On an iPhone 7 and an iPhone SE.