I did not keep these for long, so I can't comment on long-term comfort or wear, but I can say HOORAY, Sanuk finally made a sidewalk surfer with the yoga mat cushioning!!!
Way more cushioning than any of the other sidewalk surfers I've tried, and less squeaky with bare feet.
The reason I didn't keep these is solely because of the color (I got the purple ones); they're just really shiny metallic. Not my style. I thought I could just ignore it (I REALLY wanted the yoga mat surfers!!), but it's just too conspicuous for me.
I will definitely buy these when they come out in better colors... (I recommend the herringbone with color woven throughout, like the Donnas and Rios!)
Two other minor cons:
1. Short vamp, like the Shorty. I love the Donna's vamp, it's perfect. This one is too short for my liking. When I wear socks with these, a LOT of my sock shows... and I guess I don't want to have to limit my sock colors just to avoid clashing with the shoe color. So it's a style thing. If I didn't have to wear socks to work, the vamp length wouldn't matter. Not exactly a deal-breaker, but not my cup of tea.
2. Like all of the other sidewalk surfers, the sole peeks out about a centimeter all the way around the shoe. That doesn't bother me too much with my Donnas, but I think the short vamp on the Ohm My makes it look very prominent and a bit clownish. Also I tend to catch it on the lip of stairs (but I'm clumsy anyway :-p).

I wear a size 6 1/2. Sadly, the size 7's were too big and the size 6 are a bit too small. I stuck with the size 6 hoping they will stretch a little bit. I really love these and wear them to/from work every day now that it's no longer winter. I would hate to find another brand if these do not stretch as I can not see myself buying another shoe in size 6 again.

I orginally got these shoes in a size 8 as that is what I had in the plain janes. However they were too small. I had to return and get a 9. Those fit great. They do feel like there is more cushion on these than the plain janes. They go well with jeans.