Thermal Reconditioning Switch

I did thermal reconditioning to my hair 9 months ago. For the most part, I loved it, and was planning on having it redone mid July since my regrowth is getting a little to bothersome.

However, I was reading about the Phyto Relaxing product that is MUCH less expensive, AND promises to straighten will still leaving body. ( I don't like how strick straight my hair is/was with the thermal reconditioning, but it is MUCH easier for me to deal with adding body, than it was to control my frizzy hair mess I used to have)

Any feedback from anyone who has used both processes, and any issues I should be aware of if I used the Phyto product when only about 1/3 of my hair has grown out from the thermal reconditioning?