Just got to use GE for the first time last night (along with Mrs jasonvr). Had an ID connection in IAH (returning from CUN). Connection was 90 minutes (MCT is 75 at IAH) which really didn't leave much room for error.
After the long walk to the immigration hall from our gate we immediately spotted the bank of empty GE machines (nice signage directing you there). Within 30 seconds we were both done and proceeding out to the baggage carousels. At that point we saw the regular lines and they weren't pretty (not awful, but would have made the connection uncomfortable). As we were exiting only one other person approached the kiosks - a pilot.
We got out to carousel and in within minutes our bag was out. Then out thru the GE/crew line to recheck the bag. I am 99.9% sure that we had rechecked our bag before anyone else on the flight had even cleared immigration.
My wife, who usually does not get excited by things like this, had only one thing to say - "That was amazing". I think that comparing this to the mess we faced in ORD coming back from Europe, and the complete disaster we faced in LAX coming back from Turkey, is what swayed her opinion the most
Even managed to make it to the United Club to grab a bit of food, drink, and internet before heading to our connecting flight.
Even if we never use it again, it has already paid for itself. Of course, we plan more international travel within the 5 year validity period, so it will just pay for itself again and again!