Smooth zooming for canon

Because I have a problem with smooth zooming during filming, I wanted to find something that will allow me to smoothly control the ring on the lens. Of course, the best solutions costs a lot of money. Maybe in the future I would buy such a solution. Anyway, I searched further and came across to an Focus Level. It was a cheaper alternative, and at a promotional video on vimeo, it looked quite promising. So I ordered it. I tested it with great expectations. Honestly, I expected a little more. With the tripod is the lever release better. But maybe you just have to get used to it. We shall see.