Having used an oral spray for a number of years, the one continual grype from my wife has been the amount of space that the Kitty product takes up in the bathroom. I have dental implants and the use of a spray seems far more effective than the various brushes on offer. My dentist has given my cleaning regime the thumbs up - he was unable to fault the level of cleanliness at my last appointment.
I therefore feel uncomfortable when not able to spray, and the Kitty is not a portable device. I therefore decided to buy the Panasonic EW1211 based on other reviews for use when away. Suffice it to say that the Kitty has now been replaced by the Panasonic for daily use as well as travel, and I have just returned from a 4 day trip on which I used the Panasonic 2 or 3 times every day without a recharge.
The tank does need refilling several times, but the device would be too cumbersome if the tank were any larger. I have had the Panasonic for approximately 2 months and am very impressed.