“I'm not a whizzkid when it comes to performing surgery on computers, so I was a little bit cautious about fitting the M.2 hat. The instructions (online, not printed) were very good, but not perfect: one of the instructions relating to a step to follow in raspi-config simply can't be found; perhaps the documentation is out of date?
I did everything I could, and it seemed I was successful. However, permanent drives don't show up on the Raspbian desktop, so how to make use of the funky new drive? Browse as I might, I couldn't 'find' the drive in my file structure. In the end, I decided to just ditch my micro-SD so that everything would be on the M.2 drive. This was readily achieved with the imager, and now I have a phenomenally fast-booting Pi with plenty of storage. It feels like a proper desktop PC.
If you choose to buy this hat, order some M2.5 hex brass spacer/standoffs separately, as the included plastic ones aren't worth using. Everything else was of very high quality. Delivery was prompt and reasonably priced.”