Before my neurologic condition intervened, I'd gotten real close to good pullups using the bands. Jumping pullups and negatives for someone with no strength can be easy to overdo, IMO. You wind up with overuse injuries real quick. Harder to do with the full ROM of a band pullup. You get tired too quick to overdo! I really liked my Woody Bands, progressed rapidly from heavy to lightest.
Those who hear not the music, think the dancers mad.