A little late to chime in, but I wanted to give a security perspective based on a few happenings around our FI. As a customer, I love a bank with a coin counter.
The pain comes in when you have to deal with the big, heavy bags of coin. Hauling, lifting, moving in work clothes is not much fun and somehow a few of our branches had issues with finding people who COULD lift the bags.
One other aspect you may want to visit is that you want to make sure that even though it's coin, that it IS cash. Also, where the coins must be vault-like (ie: good locks and alarm or monitoring of some sort.) ... don't hide in a corner where you can't keep and eye on it.
Oh the stories I could tell .... but that's enough for tonight