The good news is that thirty people received new kidneys, and escaped the "living hell" of dialysis. The bad news is that this complex barter system is the only legal way for Americans to get kidneys. It is so inefficient that only 17,000 of the 90,000 people on waiting lists received kidneys last year.
To understand how complex and cumbersome this process is, imagine trying to do the same things with an apartment . If you wanted to move from Detroit to Nashville, you would either have to find someone who was moving in the opposite direction or, failing that, you could find a second person moving from Nashville to Los Angeles, and a third from Los Angeles to Detroit. Then you could swap the first apartment for the second, the second for the third, and the third for the first.
Why not simply allow people to buy and sell kidneys?