Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Expensive and didnt' work for me...

I tried Heather's Tummy Fiber. It made my IBS worse. I had more pain, cramping, gas, etc. and I gradually increased the amount. Also I found it expensive. I am now taking Fibersure. It has 5 grams of soluble fiber to a heaping teaspoon and its alot cheaper than Heathers. (And with Fibersure, there is a money back guarantee if you are not satisfied). I dumped what was left of Heather's tummy fiber down the drain.