I've been humming and harring over getting spd pedals for a while as I've heard scare stories of people falling off their bikes whilst using them and also I just didn't know how I would get on with them. I've had toe clips for ages and have always thought they were ok. Recently I finally took the plunge and bought these Shimano M520 SPD pedals. I just wished I had bought these years ago, they are fantastic. They have improved my cycling times dramatically and best of all they are a doddle to release from. I had a bit of a practice engaging and releasing from the pedals in my back garden whilst stationary leaning against a wall. Then I had a quick ride around the block and practiced whist on the move and doing a few emergency stops. I then did my 15 mile cyle ride to work that night and I had no problems at all. I was amazed at how much quicker my ride now was compared to using my old toe clips. As I've said before I just wished I had taken the plunge sooner. I actually ordered these from Tweeks cycles on Ebay for just under £20 brand new and delivered, which also included the cleats. I thought this an excellent price as the cleats alone go for around £12 on Amazon and various other websites. I also got Muddy Fox cycling shoes from Sportsdirect.com for £20 so for £40 all in I got very cheap entry into the world of SPD pedals.