I'm a longtime Logitech peripheral user and it's fairly disappointing that they always have some shortcomings that keeps me from loving their products. For instance, I write this article on a K760. It's similar to the Apple wireless keyboard but it's solar-powered and has multi-device capabilities. Unfortunately, its build quality is mediocre. I'd rather pay 20-30 bucks more and have a keyboard that feels better. Also, they removed the previous/next track buttons from the top row for no specific reason.
With this keyboard, the build quality seems even cheaper. They missed the chance to go solar (though that's debatable) and the fn key is in a different position than my current Logitech keyboards (they don't seem to have a guideline for this).