Same here. Loving my Slim. Looks amazing; almost as if Apple made it (the only giveaway would be the bluetooth symbols on the 3 number keys used for switching devices.I have the X1 Slim and it’s a beauty. Fully deserving of integration into any Mac setup. Only negative is that macOS doesn’t report the battery level as per the official keyboards.
Connection issues are very rare with my iPad and the charge holds for at least a few weeks.