Thanks for that info. I actually have a brand new set of Ultegra's I ordered when I bought the first pair of road shoes. I bought them because I thought I had to use different pedals for road bike shoes. When that first pair didn't fit properly, I came across Pearl Izumi's which fit both types of pedals, so I planned on just using my existing pedals and selling the Ultegras.

Luckily I've been a slacker and haven't actively tried to sell the Ultegras, so I think I'll give them a shot. I had wondered if they would work a little better with the wider base, but it's great to hear your experiences on them.

I think I'll put my spd's on my mtb to use with my mountain bike shoes, then nothing will be wasted. When I first bought clipless I could not understand why anyone would ever want to be clipped in on a mountain bike - but after getting use to them I can see how they would be helpful.

Thanks for your input, this is so helpful!