Xen Tan is definitely the best self-tanner on the market, at least for me anyway! Before use, make sure to exfoliate thoroughly before applying, using a loofah and/or an exfoliating formula/scrub for perfect application. Oh, and be sure to shave your legs at least 24 hours before application, otherwise you could end up with streaky legs, and fortunately with Xen tan, thats the only way you could end up with streaks!
Unlike all the other cheap tans I have worn, this one smells absolutely LOVELY and it doesn't reek like all those manky moisturizers and such (Johnson's, I'm looking at you!). Xen tan leaves you with a natural-looking olive tone without a hint of orange (just make sure you DON'T moisturize before application, or you WILL turn orange)! It's totally streak free- the only time this stuff streaked me was the first time I used it some 6 months ago- I shaved my legs about 2 hours before application and ended up with streaky legs. But, now I make sure to shave my legs the day before application, and there left bronzed and look like something out of a Gillette advert.
I'd recommend this 100 times over ST, Fake Bake or any of those tuppence tinted moisturizers!