Bought the charger a month ago and just used it on a camping trip so far. Initial charge at home was quite quick - an hour or two - and then used it to charge up mobile phones at campsite - again worked well, didn't take too long to charge up the phones. Various adapters come with it, and can use existing mini USB plug supplied with my HTC phone for the charger too. Seems reliable, neat unit, will be using much more on trips in the future. Seems strange to me that there is no 3-pin plug supplied with it (so only 4 stars), but if you have a number of devices/chargers anyway you can probably use one of their plug chargers/adapters as I did. Would recommend it if you need a portable charger for short trips (or as a quick emergency back up if you're out and about and don't always remember to charge up your phone or tablet).