I find this modified seat carry far superior to the technique I learned from textbooks/NFPA sign offs. It offers a stronger grip on the upper body of you patient, including if they are unconscious. I have mostly used this technique at medical calls, but have also trained with this technique during search and rescue.
The pro of this technique is that each firefighter shares the weight of the patient equally.
The con is if you had to walk through a doorway, you profile may be too wide.
I learned this technique from a social media post. I apologize I cannot remember where I saw it to give credit… I do remember it’s a technique the military uses to remove injured soldiers from the battlefield.