Oh man, that sucks! Although I don't have the Keo Sprint, I have the Keo Elle, and to my understanding, all the pedals are comparable, the higher end ones are just lighter. And some cleats offer more float than others. I believe the red cleats offer more float than the grey ones.
If you are just starting out with these, you want the tension on the pedal to be loose. But not too loose that you will unclip without wanting to. You definitely don't want to have a loose cleat!
Did the guy at the LBS put on your cleats and pedals? And did he have you go on the trainer and find the right tension for you to clip in and out with ease? I love my Keo Elles, and I find it easier to unclip when the pedal is at the 12 o' clock position. For some reason though, a rock or screw got stuck inside my cleat on my right shoe, and I can hear it every time I pedal.
I say stick with what you feel is most comfortable to you. It does take some time to get used to these kind of pedals, but eventually, it becomes automatic.



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Also, in my experience, it's easiest to unclip on the downstroke, anywhere from 12:00 to 6:00. But everybody finds their own "sweet spot" with practice....you'll get the hang of it. There's a steep learning curve at first...and then it gets much better- hang in there!

