I bought the Logitech, the case of which must be ballistic nylon, it is very strong. However I then also got the Apple Pro and haven't used the logitech since. It is not backlit, and lacks a few of the keys, but it is so thin and convenient, and protects the screen, and I got a thin leatherish sleeve for the whole thing together. The 3 rare earth magnets are so strong the pro keyboard stays on snug.
the screen is gorgeous indeed, and the iPP is FAST. I didn't realize my son had 10 games open in the backgroound while I had Chrome with 12 tabs, and the thing still FLEW, and with only 4GB. My Windows 10 laptop would choke to death with that load at 8GB.
My Logitech keyboard is backlit. I'm typing on it right now and the keys are lit. You might want to check that yours is not defective.