Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Could be better

The concept was good... but the outcome was bad....like someone mentioned below, the flow control vault tend to leak, there is nothing you can do about it....suction cup is not as strong as you think, once you filled up with 2 litter of water, it cannot hold the weight of the bag.the plastic part where it can hook to the suction cup is not strong as well, well break easily...