I bought these because I needed new summer shoes for my job as a server. I'm on my feet for at least six hours, running around a busy restaurant. The day these arrived, I wore them around the house, and then wore them that night to work (with socks). They were perfect! Super comfortable both with and without socks, and just funky enough to be cute and not tacky. I kind of wish I'd gotten them in black, but I like them enough that I may buy another pair.
The elastic band provides just enough give to be comfortable but not restrictive, and there's this great little piece of soft material (faux suede or nubuck?) on the back edge where your heel rests against the shoe, and this feature is why these shoes get five stars - I'm confident I can wear these without socks for a whole shift and not get blisters.
As for sizing, I usually wear between a nine and a ten in shoes depending on brand and style, and my feet changed after my pregnancy last year, so I wanted something accommodating. I'm glad I ordered a nine (meaning I ordered down rather than up) because there's just enough room for my toes without these being too big.
Also, my coworker the other night commented on these right away, and then yesterday asked how comfortable they were on the trial run because she was thinking of ordering some! I highly recommend them.