Flawless data and calls in LA, Colorado, and Arkansas. Plug and play in iPhone 8 and XR. Rakuten Mobile said I'd need to delete my Rakuten profile in order for this SIM to work, then reinstall when back in Japan, but that wasn't necessary.
My wife couldn't install and use the Uber app because the US number was already registered to someone's account. I now realize that you can contact Uber support to delete the old account in this case. I already had Uber set up on my phone, and had no issues.