If only they weren't three times the price of my usual! I like the idea of the stainless steel and nickel plated version, but I'd have to ride a year's worth of miles to see if it was saving me anything!I would buy a connex chain if using a mid drive, you don't need any tools to take off and put back on. You still need a chain tool to get the correct length, makes cleaning the chain slightly easier, I oil my chain at the same time as well.