Interesting discussion... Some of you will not doubt have read that I'm now the proud owner of a Cube Attention (owned previously by fellow CC'ers theloafer and cubist) and I've been swithering about fitting SPD's to it. I'm a complete convert to the clipless way having fitted them to my commuter (Flight), but I do have reservations about sticking them on the MTB...
Apart from having some boulder-bashing fun out on my own, the other role for the Cube is as "daddy's bike" – i.e. riding with my eldest daughter who's turning 11 (and getting new bike for her birthday on the 14th.. sshh!!), and also with my youngest (4 1/2 yrs old) in tow on a tag-a-long.
Now, I've not fallen yet (touch wood), but I really don't want my first clipless moment to be when I'm towing a precious cargo. I wonder if anybody uses (or has specifically avoided) SPDs in such circumstances? I do prefer the feeling of "connection" being clipped in, and I'm leaning (no pun intended) towards another set of Shimano M520's with the platform adaptors for when I'm in "Dad" mode. I guess the M324's would be an option too.
Any thoughts?