The MX Keys looks and feels like a premium keyboard, but my main complaint is that there is no way to know the actual, real-time battery percentage. I thought the new Options+ software brought this feature to fruition finally, but so far, I discovered that it is not really an improvement from the old Options software. Currently, when you hover over the battery icon, it says, "Battery is full - Connected via USB Receiver". The battery is probably SOMEWHAT full... like maybe 65 - 75%. I haven't charged it in about 2 months or so. I am hoping to see an actual, real-time battery percentage status indicator. It would also be great if there was an option to have a small real-time battery percentage indicator in the Mac menu bar as well - this way you don't have to open the Options+ software just to see the battery percentage. But, for now I'd be completely appreciative of a real-time battery status indicator in the Options+ software - for both MX Keys and MX Master series mice.