I’ve been running Manjaro Gnome 17.01 Beta 2 for the last few days as my daily driver, and I can also confirm that it runs exceptionally well on the SP3 with the SP3 Type Cover. My only gripe is the lack of multitouch support on the trackpad… I’ve tried every which way to enable the functionality, but I can’t seem to get anywhere with it (also haven’t used Linux as a daily driver in years, so I could just be a bit rusty…)
I have a SP3 of the i3/4GB variety and it runs night and day better using Manjaro than it did when it was running Windows 10. Boot time is incredible, battery life is better, and just in general everything runs smoother. There doesn’t seem to be any wait time like I was having with Windows 10. I think under Windows 10 the 4GB of memory just wasn’t enough and my computer was having to write/read from the SSD quite a bit when the memory filled up (I’m a web developer, so I’m continually multitasking with multiple Chrome tabs, text editor, Grunt file watchers, etc.)
Stability wise, I haven’t experienced anything that you’d expect from a beta release. In my opinion, it runs extremely stable, and I’d go so far as to say it’s more of an RC release, at least for my SP3 variant.