ref vox

Hey guys wondering if you can help me in making a decision, Im looking at a more realistic atc for fsx and 747-400 pmdg as the fsx atc is diabolical when it comes to route planning and using it with the fmc, Ive had a few suggestions to try radar contact as this works well but the only problem being is i dont think it a voice interacting program like vox, what im curious to know is vox a seperate atc program and can you create flightplans that can be used realistically with the fmc or would vox have me vectored off all over the map like fsx atc, could you you please help me out on this thought b4 i decide to make a purchase thanks Brett