It runs fine. Be sure to not let the screen time out, that's what looks to be the issue first couple times with my iPhone XR. Glad it doesn't need DFU as my volume buttons are broken.

I really like his tools and interface, was way irritated when the older checkm8 bug got "leaked" to apple and patched as f3arra1n allowed OTA while ibypasssignal didn't. Got an XR that has a dodgy screen but now bypassed and working with a battery from a 6s/hack to the BMS.