Out of everyone I see training in the gym, there are only a handfull that record their efforts (that I see). personally i either update on my phone between sets, or normally just after i finish... I had a pretty good memory for figures though so its not a problem, even if I have to log when i get to work a couple of hours later.
I love seeing the progress that i have made and i enjoy reading back through other peoples logs from time to time too and seeing their progress. It inspires me to push harder next time and make my self progress