FWIW, a lot of people believe that the ability to pull up is what makes clipless pedals more efficient, faster, etc., etc. But pulling up is ineffective and actually depletes energy while adding nothing. People think they are adding energy to their pedal stroke when trying to pull up but are, in fact, not. Even world class pro cyclists do not pull up on the pedals. Testing has shown them it just does not work to any advantage and is actually detrimental. Clipless basically keep your feet in one desired position, and that is a benefit in various situations.