GExum

The ZENS Liberty seems to have a future-proof advantage, in that it can charge 2 devices at 15w, where most chargers in this price range only go to 10w max. The iPhone 11 only does 5w while the 11 Pro and Max are 7.5w. When (if) Apple increases Qi charging speeds beyond 10w, 15w will probably be the next stop. I'd see this as more of a longer term investment that will last many more iPhone iterations, as well as having an Apple Watch USB-stick that could be swapped out if they changed the design or charging speed as well. Also, worth noting is that the ZENS Liberty is Qi certified and the Apple Watch USB-stick is MFi certified. There are very few charging devices, that are both Qi certified and MFi certified.