Review (5/5): Very good but.....
This is my 4th Waterpik dental flosser. This new one is better looking and much quieter. The nano (small) one is marketed as "traveller" flosser. But it is only good for traveling in North America. If it is universal voltage (120V~240V) and can be using in other countries, and then you can call it "a real traveling" set.