Ample reservoir.
Used it on high from the get go. Use it daily. Holds it's charge. Cleans teeth inside and out before running out of water. Conveniently fits on vanity with electric toothbrush, razor etc., so it became a morning ritual, whereas basin type flosser was too clumsy too fit into my schedule. Dentist wanted me to water-pick, problem solved.
Rating: 5 stars