I have been using Umcka for several years now for myself and my children. It is great! If I start using it or give it to my childen (ages 6, 5 and 2) right at the onset of a cold, it usually keeps the cold at bay, and it does not develop into a full-out cold. The only con is that I do have to catch it right at the beginning of a cold--the first sneeze or sniffle, and sometimes I'm not sure if it's really a cold or allergies. I'm also not too good at remember to give it to them 3 times a day. However, I have found it to be quite effective. I prefer this homeopathic and all natural remedy over synthetic remedies any day. It does not cure a cold, but it really does shorten the intensity and duration of a cold as it claims. Congestion Relief It is to prevent the onset of a cold and congestion. It will not immediately relieve symptoms. Relief of Aches & Pains I've never used it for flu relief. Can prevent the onset of a sore throat, not make the symptoms completely go away.