Doing this at least 1x a week (I try to do 2x) makes a huge difference in gum health. People often forget that gums are the foundation, and plaque can get stuck up there! I've had my waterpik for 2 years, and it works great esp at the price of $30.
The taste is a bit to get accustomed to, but this is the best toothpaste for plaque control and maintaining pearly whites. I use this morning and night.