I just finished the bottle of these yesterday and today is the first day I have gone without them since I received the bottle in the mail. I can already tell that I am more congested. I had no upset stomach or other reactions, although I have had some intermittent insomnia that started around the time I took this, but I don't know if that's from stress or this supplement, but I guess I'll find out over the next few days without it! I also have had a minor nosebleed 2-3 times since taking it, but that is also very normal for me at this point in the year (yay, cold weather!), so I can't say if that is because of this and am only mentioning it because it happened while taking these.I started off with one pill a day to make sure it didn't cause me any issues from the ingredients and then started taking two pills a day in the morning. They definitely help to dry up congestion and if I had received more for the cost, I would have likely taken the recommended dose of 2-3 capsules twice a day. Only taking 2 a day, I still felt like I ran out way too quickly. So, while they did work for me and help to clear up sinus congestion (in conjunction with Singulair and Claritin as I have awful sinuses), I will probably look to trying something else that is more cost-effective because I find it truly annoying when companies sell supplements that require you to take more for the best effectiveness.If they made a version of this that required fewer pills and became more cost-effective, I would purchase again. However, I can't really justify buying a product that wouldn't even last a full 2 weeks if I took the recommended 6 pills a day and I hate the idea of the wasted packaging even if I could justify the cost after I try to find a suitable replacement.Overall, it seems like a good product and it was helpful for me, but the company needs to do better to make this more affordable and more competitive with other items out there because I feel like it could have been easy enough to do by making pills with more per dose, rather than 'oh, this works best if you take 6 pills a day' while giving only a 10 pill supply. No one likes to feel like they're blatantly being taken advantage of, even when something works, and that's why I'll go through the effort of finding something else that works from someone else.