This worked well between my computer and a monitor and a projector. I used this as part of my Halloween decorations to project an image of trick or treaters outside, as well as display their image on a monitor in a window facing the door. it simply worked.
I own 4 of these, they all work really well and are affordable.
I know that VGA is so 20th century, but I find myself needing these more often that I had imagined. At this low price, I have one in each of my cable kits for when the need arises. You need to test your monitors/projectors before you actually need these to work, as the reduced signal from a non-powered splitter can be a no-go for some monitors. I have one or two monitors that suffer from this condition, and I had to mark them as such before heading out to use the splitter. Other than that, this is a great product for this purpose.
It is definitely a good product, however I did not read the description very carefully. It definitely simultaneously displays the same thing on the screen. I was looking for a product where I could move applications from one screen to another. Overall, this is a good product and works instantly!