Tank is not necessary
I like this cordless water flosser but find that the side tank is unnecessary.  It adds too much bulk while trying to use.  The flosser itself works well.  I have used it many times since receiving and find that it does a really good job.  I even used regular floss afterwards to check the areas between my teeth.  Great results.  I like that you are able to change the settings if your teeth and gums are more sensitive when you begin the process.  My mouth feels cleaner.  I also really like that I do not have to have a tank sitting on my bathroom counter.  This little guy comes with a case that is perfect for everyday storage or to simplify traveling.
Rating: 4 stars