Don’t listen to the nay sayers, if you fancy flat/clipless try a pair.I have two bikes with PD-M324’s and never swap.Go to work some days in work boots and some days in SPD shoes,(with elastic bands around my trouser bottoms) plus ride both off road clipless,great if you hit a techy bit where you’re not sure about being clipped in. Plus I have an old road bike with , I think, A530’s which are great for a flat shoe quick trip. It’s no biggy worrying about which way up they are if you are a half confident rider, you just feel it and cope accordingly.
“A two sided pedal is fine (if less convenient) for commuting but you’d really not want to use them off road” How so ?