Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Didn't work as promised

I've been on it for a week now and I'm going to stop taking it. It does help to go softer, but I'm only going once a day now..instead of my usual 2 or 3. I took it because it promised a good cleaning out. I'm getting the opposite and this can't be good for me. I give it 2 stars because the pills are easy to swallow and I notice I sleep better at night. Something in it must be causeing that. Overall, I wasted my money.