I have the exact same "model" of this keyboard and mouse set that I bought a few years ago. This has been going on for a long time, but my left mouse button is starting to fail. The quality of this new set doesn't even come close to the quality of the same version of the model released a few years ago. The keys on the keyboard of the new K350 are soft and offer little resistance. You may like it, but I don't. The old one has some satisfying "clicks" and some resistance to typing. The new M705 mouse is a joke compared to the old version. Again, it weighs less than the old version and is therefore cheaper. It's missing one of the buttons on the bottom that the old version had and has a much lower resolution than the old version, making the new mouse cursor feel either very slow or jerky as you increase the speed. One of the zoom keys on my keyboard had a plastic part of the key but there was nothing underneath so it didn't even work. I don't know how it came from the factory. Does someone check the quality there? Also, you now have to use a software called "Logitech Settings" to set up the mouse instead of the older "Logitech Settings", which won't be a problem except that no program will find the keyboard - although as I mentioned, it is exactly the same "model". I don't know what's going on at Logitech, but if that's the quality of their stuff I think it was probably my last purchase.
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