It certainly depends on the kitchen/look of the home. Some mid-century and contemporary homes lend themselves to "green" design solutions like a kitchen garden window. Take the style of your home into consideration as well as whether or not you want to deal with the upkeep of the kitchen garden itself. Do you have any more photos of the kitchen to help houzzers to see and decide?

My house is 26 years home in northern California, we are remodeling the whole kitchen

http://www.houzz.com/pro/akearney/annette-kearney
California installations

The pictures I have attached are all Pella products but all 4 give a completely different design concept and feel. One thing to keep in mind is, Casement or Sliding Windows are easiest to open and close when reaching over a sink. If you would like any Pella literature please contact us and I can mail you more ideas for your kitchen remodel.