Try them if you ever go to a country that stocks their range (the peri peri burgers rock too!).
Cool. My transition to being vegetarian was pretty effortless, we have a good selection of faux meats in the U.K., and once you put all your sauces/toppings on your meals, it is almost impossible to tell the difference between fake and real.
The one thing that tempts me, mostly because replacements are hard to come by, is pepperoni. An extra-pepperoni pizza is the one thing that would make me have a lapse. xD