Excellent for my purposes,
This review is from: PowerGen 2.4A / 12W Dual USB Car Charger Designed for Apple and Android Devices - BLACK (Electronics)
This is perfect for me. I've been using it to keep my phone (Sony Xperia SP) topped up when I use it as my Sat-Nav. I've done a number of journeys with it now and it works beautifully.
Physically, it's a good solid and attractive design.