We had a 2022 M3P with Ultrasonic sensors and when we pulled into our garage,which is pretty tight, and it would say Stop as soon as you entered but show you inches away. Now we have 2023 MY without USS and on release 2023.6.9 and it does about the same as with USS. It says Stop as soon as you enter and shows inches away. I did not measure how accurate the USS were with a tape measure so can’t say if Vision is less accurate but Vision is close enough accuracy for me. I would never depend on any sensors solely to get super close to something. All I care about is the beeping gets faster the closer you get. We had an F150 and Mercedes C300 before and neither even gave you distance. They just beeped. I think people expect too much from Tesla’s Park Assist. Even if it was operating autonomously I doubt it would attempt to get super close before stopping. Maybe someday it would but not now.