Article quality, well finished. Plastic and of good quality connectors.
The side springs hold very well the plug into the cigarette lighter.
By rotating the splitter into the connector, you come to insert the plug completely.
As the plug is quite long, it does not move, even with 2 devices connected to it.
The electrical contact may not be satisfactory to the plug, but just turn a little until the LED lights (this is true for all accessories cigarette lighter, as this connector n ' has not really been planned for it at the base ...).
Supports simultaneous supply of a GPS and charging a smartphone or iPad (provided you have the proper 1A charger).
By cons, not tried with very hungry devices (cooler, etc.). Consider: If the current drawn exceeds the "threshold" Max (obviously never specified on the package, shame ...), electronics dispatcher can grill and grill in turn whatever is plugged into it (including gadgets electronic as smartphones, etc. generally do not fuse).
So just as with 220V multi-outlet, do not tempt fate by simultaneously connecting two devices large power consumers.