Hey Ted! I've got one pair of the original style, when they were called DryJoys Tour Casuals. They are 4 1/2 years old and have 54 rounds on them. I only wear them when I get to the course, and try to walk on the grass as much as possible. Even playing 150 rounds a year, I have so many pairs of shoes that I only wear them about 10 times a year.
I think they are wearing pretty good. Lots of nubs left. The only spot that shows any real wear is the second and third set of nubs in the center row. They are worn almost level, right under the ball of my foot. The outer leather still looks very nice.
I recently bought two pair of the previous generation Pro/SL's at a really good price and look forward to wearing them in the near future. Cheers! :-)