New pedals for the Surly Long Haul Trucker.
I have completely evolved from clipless pedals & Shimano shoes to platform pedals for bicycle touring.
I now have more options in biking shoe selection and walking while off of the bike is much easier.
The initial start process is much easier now not having to do that initial "clip in" movement and pedal spin... less chance of falling on starts and stops.
I have not noticed any issues in peddling efficiencies.