Better than I expected, and worth the money, as the quality of excellent. For macro photography, this has allowed me finer control of camera position,and the camera tends to stay on this mount all the time.
I have found I need to take care not to bump my cheek on the end nearest me, though; especially when the camera is at thefar end, and the slide is wound out. Squinting into the viewfinder means you need to turn your head before looking into the screen. I can't see a way around this, and its not a problem unique to this make or model of slide.
The slide mounts slightly offset onto the tripod plate, but that works fine.
Overall, I am very pleased with this. It is all metal, and not the plastic some other makes use.