Originally Posted by AdelaaR

Sorry, but that article is complete nonsense.
Do you actually believe that professional riders would use anything but THE BEST system?

For reacreational riding ... ok ... it will not matter there ... in fact ... nothing matters if you are just riding for fun, right?

But have you ever gone steeply uphill with SPD clipless? Have you felt for yourself that you can more easily ascend because you can pull and push at the same time?
I have.
I have only had clipless pedals for about a week now and I felt the difference when going steep uphill immediately.
The logic is simple: if you can use more muscles to drive, you can have more power, right?