Has anyone done these? We are new to 1/2 marathons - we are hooked on the Disney ones but would like to try others. We're in our early 50's. Is this series primarily for the younger set? Will we be sort of out of place? We're looking at the Savannah run and possibly the Las Vegas one in December. Would LOVE the thought of the Dublin innaugural. Please let me know your thoughts on this race series. Did you enjoy it?