We love the space and size of our 21, but my wife really wanted a deeper, 2 sided sink, so with a little work, she got what she wanted. I realize that it is bigger than most people would want, but as long as she is happy... Now we can fit our dish pans in the sink as well as the dish drainer, plus gives us some room to store items while traveling.
We did have to sacrifice a little storage room under the counter, but not bad. I was able to keep the drain towards the back and off to one side. Also had to reduce the width of the top drawer. Made a sink cover out of the counter top I removed.
sink purchased off of Amazon > https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1