I would start with a cheap fabric as well. I took advantage of a $200 sale they had two weeks a ago. The fabric is currently being woven in Japan, but once it's done I'll use it to replicate my jacket. If that works out I'll start using more expensive fabrics.
I'm not really afraid of Luxire being able to copy the measurements and make a well fitting jacket. They've shown that they can do that. It's the details that I'm a bit worried about. Buttonholes, spalla camicia shoulders, etc.
Either way, I can't really complain for $200. If it doesn't turn out as well as I had hoped, I'll have to get jackets made locally and the trousers in India. It would save me about £700 per suit, so definitely worth it.
EFV had a suit made by Luxire, so perhaps you could ask him about his experiences?