Whew, you almost got nailed me, but thankfully my rebound works great and I don't wear skate shoes (while riding anyway).This drivetrain in for them, it's not for the guy that is riding a 4 year old frame with a clapped out fork with no rebound, skate shoes and camo cargo shorts.
As to your question about about chain durability, I've always found my newer 10 speed chains to be significantly more durable than the old 8 speed and 9 speed fare I used to have. Maybe because I'm so old now my max wattage has dropped below my previous savage power (122 watts).