Great...for 2 days.
I know it's a case of 'You Get What You Pay For' but I bought three of these and each lasted only a day or two before they stopped working completely - down to cheap connections to the circuit board inside the charger. When the connections snap inside and are plugged in, they heat right up too - a potential fire hazard. Also on iOS7.0, your iPhone will tell you off for buying fake (a not so wonderful feature for you to look forward to) and the phone charges intermittently.
Great for a quick charge once a month (not really practical for a battery zapping iPhone 5) but if you're using these regularly, the insides really aren't durable enough.