It seems that the LEGO Motorized Excavator will likely retire soon, so I took advantage of a recent Toys R Us sale to pick up two of them. In the past, I have really not paid much attention to Technic sets, but the more I see of these built, the more impressed I become:
The box has a flap like old-school LEGO used to have, showing all the functions:
These are 2-in-1 kits, so you can create an entirely different vehicle with it too: