This absolutely works. I purchased it mainly for by sparse areas in my brows (worked great) and thought I might as well try it on my already longish lashes. After 4 weeks I had to cut back to 1 x weekly as they were getting too long and at my age I think it looks kind of silly.
I did have some issues with dry eyes, itchy eyes & headaches but persevered with it and now I don't suffer any side effects at all. Have stocked up from ADC recently with no credit card problems so far - but my card is maxed anyway, so no one can use it ! : O
UPDATE 30/7/11 - Stopped using this on my lashes 4 weeks ago as lashes were growing in weird directions - I'm actually glad to have my old lashes back, Works great on brows though, just don't overdo it !