Not really a diffuser as it gives zero diffusion. More of a filter/covering.
Reduces the light you get from the leds (by way too much) but that's it. Just makes the leds dimmer, and it gives it a yellow tint to boot which is really not on as it should be neutral.
More like sunglasses less like a diffuser.
LED chips perfectly visible through the so-called diffuser to the point you can clearly make out the individual diodes within the chip, more so than without it even, so pretty useless all around.
It'll hide the leds and look good when are not being used. If you'll never turn them on then go for it. Otherwise...
144ic 576led/m strip in the photo at 10% brightness, and keeping in mind the limitations of a phone camera that should say it all