Hi Renee,
My two cents here...these workouts are fun and challenging, at least the Peak 10 ones that I have, but I don't know if you're going to see any results that are markedly different than what you're getting with Cathe, as they are similar in style and function, for the most part. The weight ones are somewhat similar to Cathe's metabolic workouts, where you use weights and compound moves to amp up the cardio effect, and the interval ones are based around increasing intensity in combos and then having an intense blast at the end, like IMAX. I think these are great workouts that will certainly give you variety, as there some new moves, but the style of workouts is already in your repertoire.
It's my personal opinion that if you have a clean diet, are watching portions, cutting cals, working out and not getting results, you may want to change up your regimen completely with new types of workouts that are totally unique from what your body is already programmed to do, then see if you change your outcomes. This is assuming your desired results are realistic for your body type and genetic predisposition.
Eva