Welcome Maria!
I, too, am obviously not Cathe, but can tell you what the different types of weight training have done for me.
When I began working out with Cathe in April, I had minimal muscle size and strength. I used mostly the Pyramids to build up both and was really pleased with my results after about three months of strength training (I learned that I built muscle very quickly, especially in the lower body). Since July I've been doing endurance training only and have noticed greater sculpting and definition benefits, along with being able to lift for a longer period of time before tiring (hence the term "endurance" training

). The other day however, I noticed I've lost a bit of strength in my bi- and triceps, so I'll be going back to a strength rotation in September (I think I'll be doing a shorter endurance rotation next time around!). I'm still very new to fitness--both weight and cardiovascular training--so I'm still working out all the kinks in regards to what works best for me. I know what I want to achieve in terms of muscle size, strength and definition, and now it's all about finding the correct balance of strength and endurance training to maintain those goals (and half the fun for me is trying)! I've never tried doing both strength and endurance together, so maybe I'll give that a try--I'm always up for new things.
Hopes this helps even just a little bit, Maria, and I wish you all the best as you work to achieve your fitness goals! Have fun!