This is my second cordless Waterpik. The last one failed after 3 years. This one has a much smaller reservoir and I don't think it has nearly a powerful jet. I would not buy it if I knew these facts before I purchased it.
I enjoy using the waterpik. My only suggestion would be to make the water container a lighter blue because it is very hard to see how much water is added until it spills out of the top.
We bought this water pick for travel. It works ok. It is not as good as the one we use at home. Little acward to handle with the water reservoir attached but it does the job.