As most reviewers have stated, this Conair Interplak Compact Water Flossing System’s water jet tip does NOT stay in place. It is poorly designed. When water flows through, it twirls the tip and also pushes it out, making it more difficult to focus the spray where you want it between your teeth. It also creates a mess—with water spraying your face, head, and the bathroom mirror. To stop the jet tip from popping out, you have to hold it in place with your thumb and forefinger. But that doesn’t stop the tip from twirling away from your intended target, and water still leaks out from the bottom.
Like I said, this item has a faulty design. Aside from that, the water pressure works just fine, despite others complaining it doesn’t. It's actually quite strong and sometimes painful. There is no difference in the lo/hi water pressure settings—one is not gentler. The jet tip still pops out when on the lo setting.
I know Medline is not the manufacturer. Conair is. But since Medline lists this product for sale on their website, I’m providing this review as a warning for others to save their money. If you want a better water flosser with a secure tip that doesn’t spray everything except between your teeth, then buy a different brand.