I found more strength gains using the BFL method but not sure if that was because I was eating better or just the actual workouts. After my first challenge by the book (which is what I highly suggest so you can accurately determine if it works for you), I switched to 4 weeks BFL, 4 weeks S&H, 4 weeks pyramid.
I got PF, holidays and basically lazy and put a few pounds recently. 4 weeks into BFL, my results are:
Starting 4 weeks
Weight 123.5 121.5
Waist: 25.25 24.25
Belly button: 27.25 25.5
Hips: 35.5 34.25
Height: 5'5"
I am going to do this 12 weeks by the book and then follow the 4 week rotation above. Again my strength gains have come faster than any other routine I've used.
Colleen