Pork shanks are a delicious and inexpensive cut that, when treated right, can yield a memorable meal with little effort after a nice long time in a low oven. The pork shank has a good amount of flesh as well connective tissue that breaks down at low temperatures, yielding a tender piece of meat and a rich delicious braising liquid. Using a light beer gives the braising liquid good flavor without making the final product bitter.
Pork shanks can be tricky to find sometimes. Cut just above the hock, the shank will have a bit more meat and most commonly come without skin. Any proper butcher will either have them, or have no problem getting them for you.