Has anyone used both? I've narrowed it down to these two. I like the weight selections on the Bowflex but I much prefer the size.of the power block. I'm on the small side and I'm concerned the Bowflex will be too big for me to effectively use???

I currently use my power blocks (the 3 lbs increments) and they do ok. But I am doing the kettlebell challenge and I definitely use 15 lbs the most.