Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: BIG FAILURE!!!!!

We purchased a house with 3 of these toilets. The previous owner explained they were very efficient which was important for the septic system as well as for the environment. It doesn't take long to realize that a minimum of 2 flushes are necessary to get down the toilet tissue. Then there is the issue of a s l o w refill. More often than not 3 to 4 flushes are the norm. It is also uncomfortably low. If I could give it a negative star I would.