Here are my reviews, sorry if I have a crappy english vocabulary skill.
1. The head is made out of resin and hand painted. The hair is a made out of rubberish material.
2. The bodies are made of generic 1:6 bodies, so i believe there will be no problem of finding accessories for it like hand or foot. But these were made on 2006, im not sure the availability of parts.
3. Hikaru's uniform are neatly done. Boots are made of plastic.
4. The space suits are well done too. It has a small switch at the bottom of their back packs, the LED lights are the chest. Dont know the lights work. I mean do they blink or just lights steady.
I never tried to open the plastic because the store attendant doesnt want to let it openned. But from what i saw the helmet can be worn/fit by the fig. It got also some extra hands.
The space suits are superb, but it has to be stored in a dry place. The fabric they used are like very soft synthetic soft leather. If not stored properly, dust and moisture will damage the material as it age.
2. The face are not accurately looks like with the tv/anime, i would rate it as 8/10.
Overall, for a collector these are a great items to have. Im not sure how many numbers are made, but sure these are rare to find.