My very first time using an M.2 SSD, and I don't regret it. Makes reboots SO much faster, when you can hit that reboot button and you're typing your password in again in less than 10 seconds, that's a great feeling!
"Damn this thing is fast, and cheap too! Nothing to complain about with this. It's got a fairly attractive price point, and it just so incredibly speedy, especially compared to a SATA SSD.
Windows boots up in only a few seconds. It was much more expensive to get the M.2, but it was absolutely worth it. I wish I had opted for the 500GB version, but this SSD is extremely fast.