Steve, I recently bought a Featherlite Montane, discounted in Go Outdoors. The guy there said that to make it properly waterproof I'd be best using some wash in waterproofing agent (which coincidentally was on half price in that very shop!) Anyway, I did get some as I had a couple of another waterproofs I'd been meaning to re waterproof for a while. Seems to have improved it as it looks and feels more waterproof after using (as scientific as that is).
Anyway, back on topic, it's a good jacket and phenomenally light.
With the 101's, yes, wear could be an issue. The sole probably isn't of the most durable material. I just use them for about a mile to two miles when running to the trails I like to run. Perhaps eight miles per session on tarmac might be too much for them.