I switched to clipless (spd) a couple of years ago and I'll never go back. I even put on my cleated shoes for one-block beer runs. It's an amazing sensation, really connects you to your bike an an odddly intimate way and changes the way you think about riding. Profiting from upstrokes is a good thing! as is always knowing where your feet will be. Highly recommended.
I ride 2sided shimano mtb pedals on my roadie and beater mtb, w/ shimano shoes. I guess it cost about $200 all told to set em up. best money I ever spent on bikes, aside from the bikes themselves.
