I joined 3 weeks ago, and my sister intorduced me, as she lost 2 1/2 stone. The first week I was happy as id lost 2.5lbs, next week i'd gain 1 lb, last week 3.5lb loss. My mistake was staying half and half [half sw, half my old diet - 500kcals] did I make a mistake? A resounding yes. Extra easy...