My GH has been running well for a few months now. The backend (this one is number 4), several months old is running waaayyy too hot... They had sent me a replacement, but it didn't work (problems with the threading). I returned, and have been waiting a month for the new replacement (that'd be number 6).
That said, even with the heating back end, it is used all day long, daily. I'm just careful holding it. It is without a doubt the best thing I could possibly have to replace the "one hitter" I was combusting with. I also haven't used the charger cable (except when in the car). Not sure if that has any bearing, but I do notice it's gets warm when charging from their cable.
As for spring loaded, the brass part of the clicker that makes contact with the battery would appear to have a spring under it. When I press on it, it depresses into the clicker end, and comes back when I release the pressure.