Switching between devices is it quite well solved. Google Play is the associated app (not required for current versions of Android and contra-productive) lamented much that annoys the query when switching to Android devices - that's right, but you can this message with the keyboard itself acknowledged (with the Select cursor keys and confirm with Return). The few keystrokes specially I do not feel personally now than excessive demand, if you are not too often the device changes.
On my OnePlus One I do not need this software again and since the switch is running without any problems.
There are also people who consider the keyboard too heavy, but you have to also be aware that it was conceived that a tablet is plugged up. If the keyboard then constantly upset, people would complain that the K480 would be too easy. That you have to make previously aware. Since I do not yet suffer from muscle atrophy - perfectly ok.
What I liked a lot that they can be operated with normal batteries. From built-in battery cells, I do not believe.
Initially disturbed by the fact of being forced to first time to deal with it how to use the German keyboard layout on Android devices. On a device, it took to the Logitech software. On the other device, it just needed to set up in System Preferences. But it is necessary to come himself - a guide for do not exist.
Conclusion: do not expect too much, you can have fun with it. Who has high expectations - has also led to the money to buy something better.