Another problem you might face if you buy your kitchen island as a separate unit, and not as part of the overall kitchen, is matching it to your existing cabinets. This might not be as easy as your think, but if you purchase a solid color, such as black, white or red, then you should get away with it.
A kitchen island is not a new concept, since they were known back in the medieval days when knights were bold. They are assuming increasing popularity in today's kitchens, particularly in larger homes where the kitchen is more than just a small cooking area compressed into an area somewhere between the dining room and the garden shed!
For those remodeling and looking for an "open" feel where perhaps the wall or half wall separating the kitchen and the dining room is taken down, a strategically placed island acts as a subtle room divider mentally separating the kitchen from the dining room but with a much more open feel.
Kitchen islands are mainly of the wooden or the stainless steel types. They can be used in the kitchen or they can be of the outdoor type where they can be placed in the backyard or next to the swimming pool for preparation of outdoor meals. Kitchen isles can be made of blocks where each block has a particular function or they can be one big unit that incorporates all the requirements into the structure. One can build simple wooden kitchen islands that have drop leaves to save space.