I use this charger to charge my Nexus 5. It even goes with a full-size envelope, even if the loading speed by slightly slower (in max. 3 hours, it is from 0 to 100 percent). It is easy to connect and to operate, as you have to use nothing. Green indicates that it is in standby, blue, that it is charging a device. Sometimes it's confusing, because for me would be logical green when charging, but you get used to. The display is moreover not incredibly important, as you can see on the device itself, that it is charging.
The shape may be a bit unusual, because I want to lay my Nexus 5 always lengthwise, although it does not matter. Square chargers have this little problem is not, in which case perhaps the direction of the terminal would be decisive. That's just one little thing that I noticed for myself;)
Tip: When a USB OTG device is connected or a microUSB cable, the inductive charging will not take place (to avoid short circuits, etc. Furthermore, one should be careful with pacemakers..