How much will my voice improve?

Im very interested, im thinkin about buying your products, im 18 years old. I’ve tried a few programs in the past which haven’t helped me very much. I still get strains on the high notes, how much will my voice evolve with your lessons? You Rock btw! 😀

Ken Tamplin:
to be candid, if you do the program as I lay out, it will blow you away at how much your voice will improve.