I have the ink booties that Angie (and Shevia, and Inge, too, I think?) also have. They were one of my best fall purchases. I found them quite stiff at first and they gave me blisters because my heel moves quite a bit -- but this is not unusual for me; I have a narrow heel. A few wears broke them in and now they are very comfortable.
I was never able to buy Zara footwear in past seasons because the fit did not work for me. So...you just never know. Worth a try. I agree with Angie that the sizing is pretty consistent...my 6.5 seem like a 37 EU which is usually my best size.