Instruct: Classify a given Amazon review as either positive or negative.
Query: new water pik

I bought this as a replacement for a 15 year old water pik. This is easier to fill and use, and much quieter. I hope it lasts as long. New model comes with 6 different attachments, 5 of which I will probably never use.I haven't looked yet, but I am getting curious about replacement heads. Will I have to buy an assortment to get the one I want?