Got my hands on the 1/72super pack. Got two of them actually.
First thing: You're gonna have to take apart the hip joint and rebuilt it with the provided parts. Which really sucked for my Alto unit cos I glued that part together already. Thank God I could fit my X-Acto in there and korek korek a bit until I could pry them apart.
The armor on the legs replaces the original parts. The outer covering that you can flip open to access the lock has to be removed. The small wing as well. Now to access the lock when transforming, you need to remove the entire armor.
Original chest armor is replaced as well.
The boosters on the wings are very nice, and the nozzle of the thrusters are very very detailed, and done in metallic.
The seperate box super pack is able to fit all four VFs. The colored parts are molded in white, and they give you decals to customize it into any of the four colors. Of you can paint lar.
Transformation wise, its not quite 'perfect'. You have to remove the missile packs on the chest armor and connect them using additional parts.
In plane mode, the legs of the VF-25 doesn't fit tight to the body. Instead, it hangs a bit lower to fit the armor parts. There might be a slight problem regarding the weight - its probably gonna slowly pull the legs down plane mode.
In mech mode. Well... the only complain is the damn boosters on the wings are so heavy, the mech can't stand on its own. I guess you will have to get the stands.