Obviously a non-amplified splitter is going to cause the signal to be measurably degraded by the time it reaches the displays. However, it would appear to cut the signal more than in half - if I'm looking at a display that should be at 120cd/m2 brightness, it'll be at 40-50cd/m2 with this splitter attached. It works, but it's not pretty. If you care about image quality at all, even for temporary purposes, get an amplified splitter.
Product produces a very noticeable ghosting effect when you try to split the video to two sources. It turned our pristine HD TV picture into an image that looked worse than SD. Even my wife said it looked like crap. Don't buy this expecting to split your HD source. Trust me. Try using a powered HDMI splitter instead and hope you don't have handshake issues.
The product works as a splitter, but it does degrade the video. In my case, I wanted to split the output coming out of my receiver to my TV and to my projector. With the splitter on the output of the receiver and both TV and projector connected to the output of the splitter the brightness of the image on screen greatly suffers when only one output is in use. When I physically disconnect the unused source from the splitter the brightness gets better. When I remove the splitter entirely and go back to a direct connection to the receiver the brightness gets even better.
So it does work as a splitter, but it will degrade the video quite noticably.
Just had DirecTV installed (that's another story), and realized in order to work my PS2 and DirecTV on my old tub television with only one input I would have to keep switching the plugs every time I wanted to switch. Very annoying! I bought this product, it arrived just a few days later, and it works perfectly!
PROS: Works perfectly for standard, low-def tube television.
CONS: Did not test on high-def television, so I can't say whether or not it would work on it.
I needed a splitter to split the composite signal from my Dish Receiver to two devices. I could not find one. I did a Live Chat with the Monoprice Rep and he stated this splitter would work great for splitting a composite signal as well. It is now connected to my receiver and is sending a strong signal to both devices.
I'm using this as a composite a/v splitter for my daughter's TV so she can use her VCR and SNES. This lets both devices use the single set of ports on the TV with no discernible loss of audio or video quality.