How's the battery?
In fact, the only fly in this otherwise delicious ointment is that battery. After an hour or so of driving the GTE hard, the electric motor usage noticeably starts leaking battery juice at a rate of knots. Before it was lost entirely, we had a go on full electric and it's noticeably slower, with all the grunt on the low end like any all-torque immediately electric car, but still entirely useable.
The a top, all-electric speed is 81mph but you'll rarely use this, clearly, as with that 31-mile range it's for running about to and from work/the shops/gym, possibly, not motorway stretches. In electric mode an “E-power” bar on the dash helpfully tells you how much juice you're burning, up to an “E-max”. Then, when the Duracells dribble out, the car puts itself in “battery hold” mode and fires up the petrol.
The battery, then, is more “Apple Watch” than “Tesla Model S”. Sticking the car in battery charge mode has the engine drive a dynamo to recharge it, with 15 minutes sturdy driving charging the battery back to almost 50%. The Golf's noticeably less “right foot-y” in the absence of the extra motor, but we guess that's your fault for driving like you've got a preggers in the back.