I had just finished killer buns and thighs when I started the program. I used heavier weights and did the harder modifications during phase 1. I saw amazing results in my first month even though I worked out before. I would stick with it, get heavier weights (when you can), and do all of the harder modifications. You can also add more time to each workout if you don't feel like you are burning enough. I add a workout or two from Jillian's kickboxing video to the JMBR program 3 days a week. So maybe you could add a circuit or a full workout (if you have the time) of 30DS or killer buns? Hope this helps!

I don't think it's too easy (coming from three rounds of P90X right before this). It's also a great "get ready" phase... now that I'm in Phase 2 and she's throwing a lot of the moves together, so that upper and lower body are working together, or cardio + strength are happening at the same time, I'm glad I went through all of Phase 1 so I could be aware of what all the moves are and how to have proper form, particularly when combining them.

I would say, though, I really pushed myself in Phase 1 to go harder and faster - I definitely pumped it harder than a lot of the people in the videos did (they seem to take it a bit easy at times). Just push yourself - you can always make it tougher by upping the intensity, if you want/need to.