I have only a few 35mm and 110 slides to transfer into a jPeg image. I know that what you see is what you get, but the slides varied in quality and the bad images came out very contrasty, even when I changed the exposure compensation. The Kodak slides I had with the cardboard mounts I had not problem with inserting through the slider mechanism, but the plastic AGFA 110 slide mounts were thicker and therefore tight in the mechanism to push them through the holder didn't work, and it jumped over them. I had to manually insert them.
With the instruction book, it appears to be easy to use, but the way it is written is not clear, and was confusing to use and it was by trial and error is how I found how to use it.
As slide copiers go, yes, it does the job, but if you have a lot to copy, it may be worth considering paying more for a better built machine. Just one thing to remember about it ..... it's a slide copier, and that's all it does. I found by enhancing the photo by post production does help with special software to correct sharpness and colour balance, but if its a poorly processed image in the first place, you cannot do much with it.
The video showing how to operate it is good, but don't be fooled by the image, as what I took was okay but not really good. Unfortunately I haven't got any professional images to see what it can actually achieved by this machine.