I am clearly in the minority here but I am impressed by the plastic quality and paint apps on this toy. The white is solid with a nice mat finish - We could have easily have ended up with a crappy thin (almost translucent) 'Alternator' white or a Hasbro swirly cheapo grey but instead we have a solid color. The red metallic paint also looks really nice.

When I stand WFC Prime next to Megatron, Prime is the one that looks KOish. I have grown to gradually dislike WFC Prime's paint finish so I may end up getting the superior Japanese release and flog the Hasbro one.

I wouldn't call the hover tank mode a 'third mode'. It's the tank mode in hover function just like in the game - The tracks are for speed function, kind of like changing gears on a car.