So I don't know about you guys, but I am a dripper 100 percent of the time and I like this because it puts out small drips. Instead of two big drips, I can do five small ones, or four, or whatever I need. It is great for the HH 357 which, IMO, is best when you can administer a precise amount of juice. You get to know your atty so well, that you don't always want to just put two large drops in. That being said, I feel that dripping with the U Can is pretty hard on it. After one month of straight dripping with the U Can, it has a leaking problem. If I stand it up on the table, it leaks from the bottom, from the plunger side. When you do use the U Can, the plunger side lets air into the can to compensate for the juice the is removed, which is why it doesn't gurgle and bubble when you are filling something. That is a nice feature, but that also means that the plunger seal cannot be attached to the can itself. It is attached to the plunger, and then just presses up against the can, so as to let air in when needed. if it sits over night, I will have a ml of juice on the table. I bought it from vapingxtreme and am waiting for a reply to see if they can swap it. Before this problem started, I had to tighten the screw once before, but that was only a few days into owning it, and it was working great since then. We will see, if they don't replace it for me, I am going to take the plunger part apart, to see whats up with it, and will post pictures. I wonder if certain juices accelerate the seals deterioration. Can the U Can hold up to constant dripping? If I get a new one, I may only use it for filling clearomizers, which is almost never, except for road trips.