To the folks complaining about falling:

Didn't you fall when you first learned to ride a bike? Why get so upset about it now?

You have to give your body time to adjust to the new system.

Step 1: Put on clipless pedals
Step 2: Expect to be perfect at it

is just like

Step 1: Get my first bike (learning to ride)
Step 2: Expect to be perfect at it

or

Step 1: Buy my first skateboard
Step 2: Expect to be perfect at it