U shaped kitchen floor plans can be very efficient designs, with everything close to hand and no through traffic.
The main downside is that you have two corners to deal with. Sometimes if the opposite working walls are fairly close together you can be better off using the space as a galley rather than a U.
A galley or L-shape can sometimes be turned into a U by adding workspace across the end of the galley, or a peninsula to an L shape.
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