I re-started Week 2 today. I'm very glad I didn't start Week 3; I'm a little "off" today (slight headache, etc.) so this was definitely enough of a challenge. I didn't feel as good as usual afterward since my body isn't quite up to par, but I did feel like the workout gave me the energy I needed to get through--and even enjoy--my morning.
Now it's naptime for the kids, and probably for me too.