I have been using Sienna X for a few years but recently have tried and been totally converted to Exposed. My clients absolutely love it, the fact that there is such a wide range of solutions to be able to offer a bespoke tan suitable for all skin tones, it's non smelling and quick drying. There is also an Express Tan which develops in 2-4 hours, my clients love the convenience and versatility of this, they can be tanned and out on the town in a few hours. I have found that the colour is fab too, no orange undertones ! Definately recommend exposed...hope this helps x