This is cute pump to pair with jeans or a cute dress.  I've worn both ways.
Just a note that the strap is not adjustable.  Instead, it's part of the pump.  At first I was pondering how to put my feet in and came to the realization that the zippers have a function.  They are not decorative.  You unzip and then slide your feet in.  Once secured, you are good to go.
The shoes are comfortable:  the height is just right and the straps keep you from slipping out.