I bought the submission master awhile back.. Some patience and resilience and eventually the dummy started to loosen up and my reps for the rubber guard started going through the roof. I've always said for myself that in order for me to be effective during my live rolls, I need repetition... I needed to build the connections through drill!.. With the use of this dummy and a considerable amount of stretching, I noticed steep improvement. + you don't have to sit there and listen to people ...(because your form or execution of the Rubber Guard may initially be off) just knock it all together.