Really handy if you own lots of devices,
This review is from: PortaPow 2.5A Quad USB Wall Charger with 3 Year Guarantee (European Plug) (Accessory)
This will happily charge my Nexus 4, Nexus 7, an iPad 4 and a PS Vita at the same time without getting hot or malfunctioning. Great for hotels that only give you one plug socket. Not so great if that plug socket has no room under it as all the wires come out the bottom of the plug.
The only thing is the LEDs are very very bright so if you plug this in near your bed in a hotel, stick some electrical tape over the LEDs first because they're bright enough to light the room.