To summarize this kit in one word it would be: Awesome!
Kit was extremely fun to build. You can really appreciate the complexity of it, that being said it is not for beginners. Instructions are still very clear, Tamiya quality, just always double check, especially the transmission build. Like the other reviewer stated you do not need the MFC kit as a required item. The kit can run without it. My advice would be to purchase ball bearings for the kit so you don't need to refit later. Use plenty of grease in the transmission and the axles. It's a very fun kit to build with plenty of different ways to set up the electronics (servo's and reciever). Buy it! What are you waiting for??!
Very funny to build - it's better to have the complete ball bearings set, because dismounting the complete vehicle for a later upgrade will be a mess. It's very realistic.
If well assembled runs very smootly on every surface, and it's very good looking. The gearshift is working very well. There is the option for the 4 wheel steering, but a high torque servo is recommended. Unfortunately, a strong servo will break the servo arm in the kit if not range limited in some way.
its not realy a review but all i wanted to say is that in the reqired items it says multi-function unit hovever, that is not reqired for the use of this model, it is an option part so it can be used if you choose to have it. :)