I got the Charji Rev. B device yesterday. Gave me a max 17mbps speed. Im in Lahore, Johar Town near Shaukat khanum. I'm not too sure about the consistency of the device since it gives around 7-10 mbps during peak hours. I've used it for 2 days only, but I think I'm going to return the device after testing it in a day or two. I'm not satisfied as the signal drops in most places in my house.
Below are some speed test results for the device: