For the money, the WSM is hard to beat. You can smoke ribs, chicken, pork butts, pork loins, briskets, and even a turkey.
The smoker has two racks, a charcoal grate, and a water pan. There are websites devoted entirely to the WSM and it's use.
If you are new to bbq or relearning the craft, the WSM is an inexpensive way to get your feet wet.