This water jet form Interplak is a vast improvement over their model WJ6RW. I liked the sonic aspect although I am not sure exactly what that might be. It felt like it accelerated the pulse of the water jet but regardless it felt cleansing. The little drawer under the motor was also a nice feature. All the little attachments could easily get lost without that convenient storage. I felt it worked as well as my WaterPik which is what I went to after my disappointing experience with the WJ6RW. The pause switch worked better than the one on my WaterPik. This unit performed to my expectations and I would recommend it. I am always amazed at what comes out of my teeth after I have flossed and brushed and then finally used a water jet. So I recommend using a water jet and I think you would be pleased with this one.
With that said, I would recommend they add an additional standard water jet tip. The aforementioned WJ6RW had two standard tips and luckily they fit this unit so I will have one and so will my spouse. This unit is noisier than the WaterPik, not annoyingly so but it is nosier. The packaging on the WJ6RW was a matching Styrofoam mold type that securely held the unit. The packaging on the SWJ1 was cardboard and it did work. I don’t know who played soccer with the delivery but the Amazon box was worked over and thusly the packaging on the SWJ1 was crunched up a bit. The interior cardboard kept the unit from being damaged but the Styrofoam on the old unit seemed like a more secure method of avoiding damage.
All of that taken into consideration I would give this water jet a five star review. I did receive this unit at no charge to review it.