This is a really nice "Water Pick". It's totally self contained, compact, provides sufficient power, runs quietly and removes food particles that the tooth brush misses. It's easy to use, easy and quick to fill, and works very well for a battery power product. I have had and used a counter top Water pick, but never really like it. This Panasonic device I like a lot better, and it costs a lot less. Yes, you may have to refill it once or twice with each use, but the filling method is so quick and simple, I would not consider this a issue for most people. This unit would be easy to travel with too. It uses common batteries that would be available anywhere. I would recommend this product to anyone looking for a better water pick.