Incredibly high quality. I had very high expectations for this door but it even exceeded those. The value, especially when compared to the price of custom  doors is simply undeniable. The glass is extremely thick and the top rail is almost completely solid aluminum so it's extremely heavy and sturdy. I couldn't put 5 stars because the installation instructions were some of the worst I've seen for any product ever. But we got it figured out and it looks great. I'm definitely buying the 76" version for my other bathroom with a walk-in shower.