I got Crank Brothers Quattros for my road bikes last year and I love them. They are easy to get in and out of, but are still virtually impossible to accidentally unclip from. They are nice and light and because of the way they work the stack height doesn't vary between my road shoes and mt shoes (the road shoe gets an u shaped piece of plastic that basically recesses the cleat). That means I get to wear my roomier and warmer mt shoes even when riding my road bike in the winter - yeah! I can fit more than one pair of socks on. I have Crank Brothers Candys on my city bike.