Sorry I haven't replied before this, I just got back from vacation....
Tigerman, This kit was really fun to build.. I have only two points that I didn't care for.. One was the indy track links.. I replaced them with Friulmodel ones.... And the instructions are actual photos of the model in the assembly process, so some of the details are vague... I would recommend building a Tamiya version first to see how things go together, but this kit does have better detail than the Tamiya kit.
Phroosh, The ONLY interior detail is the gun carriage, there aren't any stowage racks for shells or anything else, so an aftermarket interior kit is probably advisable if that is important to you..