the speedplay x/5's are actually the easiest to get out of... they even say on their site that they release sooner... i have them on my bike and love them! i was using looks for a VERY short time prior to getting my X's (i actually have the x/3's but they have been replaced with the 5's)

i was going to get the frogs for my MTB since i loved my speedplays so much.. but i was told by numerous different people that they weren't such a good choice.. they like to come undone when you don't want them too....