We all ordered a Sparabo and get 4 essays per semester for 2 people. The price is not necessarily cheap (because one must also purchase the device!), But okay.
In the last delivery was a revised version. It may sound stupid, but the back now feels even better in the mouth.
The brush with the 4 plastic sailing does a good job. The "sail" make the teeth nice and smooth. At the ends are longer bristles to come well into the interdental spaces.
For me the best essay support my device!
