I liked this video much more than I thought I would! I was a little leery after hearing how "giggly" she was but I didn't find her to really be that "giggly" here (no more than in her other videos).
It is only about 20 minutes of actual workout, but it's a lively little workout and great for an add-on for intermediate/advanced exercisers. The kickboxing is drill-style--30 reps of this, 10 reps of that.
You regularly do 30 sets of punches (or high uppercuts) in a horse stance, sandwhiched between other drills like squat front kicks (not truly deep quats), "sumo squat" roundhouses, sidekicks, front-back kicks and basic aerobic moves like jacks, fast feet and knee raises.
If you liked drill-style, no frills workouts like Tae Fit or P90X's Kenpo, this might fit the 20-minute bill. I like the array of young but non-glamorous background exercisers (shades of P90X) and the brightly lit but not fancy gym setting. Jillian wears a red bra and low-slung (but not obnoxiously so, IMO) sweatpants cut off below the knees. One girl does beginner modifications. Jillian certainly screams and giggles a bit but I didn't find it distracting or annoying.
Jillian is cute, competent and charismatic, and after doing her Maximize and Shape Up videos, I'm getting used to her style. She's kinda growing on me. I still think there's a bit of the "tough girl" TV persona with the yelling at exercisers (in a faux-tough way) but nevertheless she is engaging and comes across as sincere in her motivational "yelling" to me. In this particular video, I was not impressed with her kickboxing form on a lot of the kicks.