Bests & Worsts Reviews from Amazon

I bought this keyboard because I wanted a wireless keyboard with a numpad and device switching capabilities to support my Windows PC and two iPhones. However, this keyboard falls short in every way so I returned it. First, the keyboard itself is quite heavy because of the built in mobile device stand. I think the stand was a cool idea, but in practice is not very useful for me because I like typing with the keyboard in my lap and so the device's screen ends up uncomfortably close and low relative to my eye level. Second, the wireless connectivity was quite spotty beyond 3 feet. When switching devices, if I was too far away from the USB receiver I'd have to get closer momentarily before switching, after which I could go a few feet further back, which was annoying. Also, my first few keystrokes after having the keyboard idle for a while or switching devices consistently were not detected, so I had to keep backspacing to retype my first word. I used Bluetooth to connect to my mobile devices, which seemed to work OK, but I put the devices on the stand, so I don't know how well it works from a distance. Regardless, even with Bluetooth some of my keystrokes were still not detected. Third, the keyboard layout itself is kind of weird. I didn't realize when I bought this keyboard that it is not actually a full-sized keyboard despite the numpad and I found myself missing the arrows and insert/home/pageupdown/etc keys being in their regular place on a full-sized keyboard instead of being compressed alongside the alphanumeric keys and having to use Fn keys to toggle certain behaviors. Also, by default, the F keys at the top require you to use the Fn key, so things like Alt+F4 become Alt+Fn+F4 to close windows. The only way to force the F keys to behave as F keys without using Fn is to download some special software called Logitech Options, which again was pretty annoying. Perhaps the more egregious error that I found with this keyboard was that the Windows Start key and the Alt key were swapped (as in the keys were labeled correctly and had correct placement, but pressing Alt would bring up the Start menu and I had to use Start in place of Alt for some keyboard combos, like Start+F4 instead of Alt+F4) for some reason that I was not able to resolve, even with the Logitech Options software. Additionally, the right Ctrl and right Alt keys simply did not work at all. Logitech tech support is also pretty lousy and didn't get back to me for weeks when I had already returned this keyboard out of frustration. In conclusion, if you're looking for a full-sized wireless keyboard with device switching capabilities, don't get the K780. Instead, I recommend the K375S, also by Logitech. The K375S is full-sized, wireless, and has essentially the same device switching feature as the K780. The wireless range through the unifying receiver USB dongle is also not great, but I have no complaints after switching to Bluetooth. I have encountered significantly fewer issues with my keystrokes not being detected using this keyboard and all the keys function as intended. I still needed to install Logitech Options to force the F keys to behave like F keys without using the Fn key, but that is a minor annoyance relative to everything else. Also, the K375S comes with a detached device stand that you can place further away from the keyboard, like on a table, which makes the keyboard itself much lighter than the K780 since it doesn't have all that extra weight of the stand.