LisaP, like Angie, I don't find true gear sneakers all that comfortable. I wear them to run in, and wear cross trainers to the gym, but I don't much like them as walking shoes. I have to put insoles in my fashion sneakers to make them work for me, but with those insoles and no-show socks, they're pretty good.
As for the EFs, they're basically fashion sneakers without the sides and top. The spongey sole absorbs impact, which -- given my history of PF -- is my biggest concern. I admit, I did get bottom of foot blisters from them on my first wearing. (Walked about 12,000 steps in them that first day). But now my feet are used to them, so I knew I'd be fine for what promised to be a full day.
Many people would find them perfect. (They get largely great reviews). For me, they're slightly too flat to be ideal, which is why I was glad to get them off at the end of that long day. (12.73 miles) But they're a comfortable, versatile sandal, for sure.
The Vionics are much better for my arches -- my feet feel positively energized in those! But because the 15,000 step day was my first wear of those and it happened to be humid, I did get top of toe blisters. They'll be fine for my next wearing. But I'll let the blisters heal up first!
I think for me that's the secret. I rarely wear the same shoes two days in a row, except for my Fitflops. And the other secret is that I walk every day (or almost) so I'm used to walking, if that makes sense. When Mr. Suz and I go on holiday, it takes him a while to get acclimatized to my pace. He's quite active himself, but doesn't walk as regularly as I do, so he needs a few days to get comfortable with that. If your regular day is 10 to 15 thousand steps, it's not such a big a stretch to double it.