Well I think it is wonderful that Mongo has something he feels empowers him. It seems to make him calmer and more self assured. Lord knows if he feels insecure..........
The "flaw" as it can best be described, to using TARDIS for a woman shopping is that, unless she is into "Retro" the most expensive parts of the wardrobe must be the "latest" and the also have a very short "trendy" life. "Rigel-9", really? I have heard their designs are sooo next century.