Some good, some not so good
Things I liked:  #1 - The price. At $19.99 I think this is the least expensive water flosser that I've seen.  A good value for the price.  #2 - The handle, it has a couple hundred little bumps on it to make it easier to grip while wet.  #3 - The power cord, its a standard USB to micro USB cord.  I've got tons of those so I don't have to worry about losing the cord.  Most flossers have specialized power cords.  Things I'm not fond of: #1 The water tank - it's unique in that you pull it down from the unit to remove it.  It's awkward to remove/replace and it doesn't have a large opening for filling the tank.  I have to question how long it's going to last since the wear and tear seems pretty heavy; #2 the hose connecting the tank to the flosser. The hose in my unit was about !/16" too long.  It wouldn't move, it was stuck in one position in the tank.  I cut off just enough to free it but it's still too stiff to allow it to move around to get where the water is when the tank is low.  Summary: A good choice for an inexpensive flosser.  Doesn't have some of the nicer features found on some higher priced units but good for the price.
Rating: 4 stars