Like most assessments also I can give only a "very good". We've tried a lot of nasal showers - Flask very expensive and delicate, other devices of Emsersalz and comparable (with adjustable discharge opening / closing). In these devices, the water pressure was too low, so that the flow through the nasal cavities very slowly went, and the opening / closing too cumbersome, and the flask is shattered one day (perhaps because of Kaliablagerungen on the walls). When Jala Neti nasal douche there is no such problems: The preparation of the salt solution is very simple (and very inexpensive due to the use of normal saline), the brine flows swiftly and powerfully through the nose / sinuses and is easy to clean / disinfect. A repeated rinsing the nose in the day I would not recommend so as to dry the salt solution, the nasal mucosa (possibly apply Nose oil). But that is not a product-related problem, so highly recommended.