Originally Posted by Squeezebox

It's not marketing hype it's real. Sounds like many of the "clipless is unnecessary" folks have not ridden clipless.
The last time I forgot my cycling shoes and rode about 100km in crocs it tore up my legs so bad I could not ride a bicycle for a month, could hardly walk for 2 days. When I go to the grocery in tennis shoes I feel the stress of mis-aligned ankles and knees. Not so with my cycling shoes. I would never ride on flats more than a few miles for fear of significant injury.
Geez it takes about 30 seconds to change shoes , Max. The 1 pr of shoes argument just does not hold water compared to your safety.
That's my experience.

Originally Posted by Squeezebox

I'ld use something heavier than a plastic grocery bag or such for the extra shoes on the bicycle. Consider a stuff sack maybe from Rei, or a turkey baking bag.
I can feel my ankles and knees poorly aligned on the 1 mile trip to the grocery. Maybe that's just my anatomy? 60 miles in crocs on Look pedals was a mistake I'll never repeat.
But let me ask, is riding 60 miles in trainers any much better? I'll take your word on it, but I'm not gonna try it.
By the way my around town bicycle does have clips and straps, I feel more secure in those than flats.