I have the Powerlab 8 and i am very happy with it, it is a great interface and a fast charge, the only problem is that you have to get a big power supply, but that is a positive problem.
One thing that you should keep in mind, get the data cable when you buy this charger. i don’t have it and you need it to update your charger with the new firmware. Other then that i am a happy with this charger.
I would like to do a full review but there is no need the guys at Friend of RC have made a great review, watch it here.