High-quality assembly, but the software is completely unnecessary. The items that Logitech creates are of high quality, but the company's software is overly complicated and does not always function appropriately. With its positives being: Quickly connects to various devices. Long-lasting storage for the batteries it holds. Considerably weighty. It is quiet, yet there are places that are even quieter. Various disadvantages: There is a configuration option for the F buttons to function as multimedia keys. The function is active by default, and if you want a row of F buttons, you have to switch on the flag in the software. However, when you turn it off or on, the setting is cleared (in the keyboard), but the software does not take the settings for this function into account when it is first started. The absence of backlighting for the keys is not a huge detriment, therefore I cannot ascribe this to that.