I bought one and returned it within the 2 week window, well before the last day. I didn't even use it the last weekend I had it, I couldn't be bothered. When I brought it into the Apple Store to return it, the employee who processed the return seemed happy I was returning it rather than getting stuck with it, she didn't pull her punches when talking about it, which I found a bit shocking from an Apple employee. She marked down the reason for return as "not enough content", so I'm assuming that's why most people return it, but that wasn't really my issue.

While the new head strap was better than the original, it still wasn't all that comfortable to wear. Some things were super sharp, while other things always looked blurry. The window system still seemed buggy and I'd describe it as finicky. The battery doesn't last long enough to feel comfortable untethered, while it also gets in the way while being plugged into the wall. It also felt like a lot of work to actively look at what needed focus all the time. It still feels like it should be in beta, maybe even the lab. I'll be willing to try again down the road, but it's hard to tell how much attention Apple is really giving it, as we haven't seen all that much progress in the last couple years.