I purchased this at Target on sale before Christmas and started using it right away. It is very easy to use. I love that it holds a lot of water so your flossing is quick and easy to do without stopping to add more water. It is powerful, so start on the 3 or 4 until your gums get use to the force.
I had bought this waterpik for my husband a couple of years ago and he has been very happy with it. So when I needed one, I bought a cheaper model from another brand. I only had problems with it. It was leaking and cheaply made. I sent it back and then bought this one. I cannot tell you how happy I am with it. It is durable, works great, and my mouth feels fresh after every use. I love it!