I've got some Time Z Freeride pedals which i've been using for years on a commuter when i lived up in london. Usually ride the mountain bike on flats but recently thought i'd give clips a try. Found them difficult to panic unclip out of or even when trying to unclip a foot for a corner as you seem to have to twist your foot a long way before they release. Never bothered me when commuting as i never really needed to get out in a hurry. Are the Shimano ones which seem more popular easier to get out of quickly? And does the surrounding grip on the shoes make a difference? I've got some standard specialized spd shoes, xc race style one.