Hey. I'm about to return these, but not because they're bad. Am leaving a review as my experience might be useful for others.
First of all, sizing: I have a pair of Connect 2s, which I wear with the insoles in, in size 43, and that's right for me and and very comfortable. These, however, in 43, with or without insoles, are too big & lots of space beyond the big toe and also really too roomy around the ankle and heel, especially given that they're slip-ons. It's hard to imagine that even if I came down a size, they'd grip the heel and ankle enough. Meanwhile, my toes splay wide, so I'd be loathe to go smaller in these anyway & even with the fairly stretchy upper.
Also, I wear the insoles in my Connect 2s because without them, my toes sit below the lip of the sole and it's too restrictive for my little toes. Much as I love the Connect 2s, I thought I wanted the option of a much thinner sole, but now I've tried it, even just in the house, I'm not sure I do. Maybe something to work towards, but I'm not there yet.
I also think I prefer the Connect 2s' Ortholite insole to the Flexile insole that comes with these. There's something almost magically comfortable about the Ortholites. If I was going to keep these, I'd probably get a pair of them to replace the Flexiles.
I'm making the return with some regret as I really like the way these look, but it seems clear that practically they're not going to work for me.