Well, to be honest, not sure about making my hair grow 'faster', but i can say my hair looks better for it, and perhaps thicker. I was using it every time i washed my hair, every other day, for around 4 weeks, now for the last week, i use it about twice a week. I would say this is better than using any intensive conditioner, but quite pricey.
Oh, I used that earlier this year and it did make a difference to texture and fullness. The bits of patchiness where it had thinned since having my boys have got fluffy new growth now. I loved it, need to get some more on 3 for 2 again