I live in Brazil I bought waterpik wp-360 in february 2016. The product was working perfectly and I loved it but after the first discharge did not work anymore. It isn't charging and in Brazil I can't exchange.
I bought this because of one problem tooth and it appears to be helping. One problem with this model is I have to fill twice. I did buy the least expensive one and I probably would try to get one that lasts one minute.
I bought this new waterpik for my upcoming road trip where I'll be gone from my normal counter-top unit for a couple of months, I have used it twice, just to try it out. While it seems a bit awkward to hold, I'm sure with continued use, I will get used to it's size and weight and it worked just as good as my counter-top unit.
Not happy with the cordless model. Water chamber to does not hold enough water to complete upper and lower teeth. It's works to remove food. I will be buying the model with holds more water and can control the pressure.