does anyone use these? i've been using "simple sun kissed moisturiser" for close to 3 months now and didn't notice any difference at all. is it just me or is this stuff rubbish? i'm wondering how they are supposede to work anyway. do they actually tan the skin or is it just like a paint job? well, obviously, the simple stuff doesn't do either, but there might be products that actually work. would you recommend one, please?