I first started mountain biking years ago with single release SPD cleats. I just couldn't get out of them fast enough at the top of hills and would frequently go down. Switched to multi-release and what a difference. I could easily disengage and never accidentally disengaged. I have never fallen since. Now I user multi-release SPD cleats with M540 pedals on my cyclo-cross for commuting and pleasure. I have never fallen or disengaged when I didn't want to since switching to multi-release many years ago. My advice is if you are going with SPD, get the multi-release.
I also always dismount/stop/mount with one foot still clipped in and have never fallen.
It just seems natural to me and really helps me with my 30+ mi commute - I can't imagine riding any other way now .My wife, on the other hand, just never could get the hang of it and gave up after numerous falls (I still have her pedals for back ups / trainer
2012 Felt F55X