Customer service has been good, but so far I've had two defective products shipped to me. Hopefully the third one isn't broken on arrival. The third one appears to work. I compared it with a $15 IR flashlight that I bought, which is 850 nm. Both are equally bright on the camera and the cheaper light has a square beam when you zoom way in, but I personally don't mind it. The cheaper light also has a more uniform beam at wider angles. The other light won't attach to the rail mount adapter, which is a downside, but unless you really need the more covert 950 nm, I don't see how the Sionyx light is worth the price.`