I have blast-straps and have used them for push-ups, fat-man pull-ups, ab rollouts, face pulls, triceps extensions and a few other exercises. I use them on and off depending on my training at the time.
I have power rings. I use them for muscle ups, pullups, dips, pushups, and L-sits. One of these days, I will hold an Iron Cross. I’m slowly working my way there.