Sometimes our customers explain it perfectly. Here is a recent review:
"I had a Waterpik previously, and it worked fine until the on-off switch became intermittent. So I decided to try the Weldental-- and I'm glad I did! This flosser is great! Works great, easy to use and load up with water and the Xylitol tablet; the tablet rarely leaves any residue behind to be rinsed out; plus, you are minimizing bacteria around the gums by using it. The tablets cost extra for more bottles, of course, but I bought enough to last 3/4 of year, so I'm all set. The pressure output on this flosser is not like the Waterpik-- it has less pressure coming out even at the highest setting when compared to the Waterpik. At first, I was disappointed by the "low" pressure, but then I got used to it and it is just fine by me! I don't know of any disadvantages, but hey, I'm biased-- really like this product-- hope to use it for years to come! If it falls apart for some reason, I'd buy another one in a second!"