When I was starting training, I wrote off this move because I thought it was for bigger people. I was a gangly 145 lb teenager at the time and it was much easier for me to use moves like the foot drag and the foot lift and the knee and elbow to escape. I even remember hitting this move on black belt world champions as a blue belt. I remember being stoked at the time and thinking at least I have this mount escape thing figured out. The problem was that when training with Saulo and Xande Ribeiro (and there are a lot of problems when training with them), is that their mount attacks are amazing and their guard passing is just as good as their mount attacks. So even when my bread and butter escapes would work, I would just get my guard passed again, only this time I was more tired.
Once I invested a large amount of time into the technique, it has paid off many times over when rolling with Saulo, Xande and Lovato. I have used it successfully in competition against world champion Romulo Barral. It is probably one of those moves that I will use all the time when I am older, less conditioned and have a young training partner pass my guard.
For those people looking out for some of the sneaky details that I learned, RIckson does a great demonstration with Budo Jake here: