I got the prescription lens inserts that Apple had suggested, and when I first put on the device I thought that either my eye doctor had gotten my prescription wrong, or something was defective with my device.
The blur is distracting -- and looking further away makes it more obvious, as the objects in the background move around a lot more when turning your head vs items really close to your eyes.
He also says you can read your screens through passthrough, but I've found that not really to be the case, at least for devices like the iPhone or Apple watch. I've had to take my Vision Pro off many times not only to read a phone notification, but also for anything that requires Face-ID (which doesn't work well when the Vision Pro is covering your face, which feels like an Apple ecosystem fail).
I'm still enjoying it, and I bought it knowing it was a V1 product, but it also shows how far have to go, even with a ton of engineering put into a product.