Pros: The Hertz rep suggested I try Jeep's flagship and sweetened the offer with a big discount. I was not disappointed. The vehicle did everything we asked of it with aplomb! Hertz at Prince George airport is super convenient at literally 100 steps from flight arrivals! Try that at Heathrow!
Cons: One of the rear seatbelts was difficult to disconnect. Clearly not a Hertz issue though we eventually worked out how to disconnect it (tilt the rear seat forward to provide extra clearance).