Yes. I have heard of them. No, I would not order from them. They are based in China and their shipping times are horrible. That is, if they actually get your measurements right and process the item correctly. I have heard numerous stories of disasters from them. Everything ranging form the item being of poor quality to improper materials, to shoddy workmanship to poor communication. Honestly, the best thing you could do is to find a local seamstress or costuming company and get a pattern and fabric and do it yourself. Also, you may want to look into your local chapter of the Rebel Legion - the costuming club for good guy costumes (sister organization to the 501st Legion). Since he is an adult, you can proceed towards a screen accurate costume (they are not horribly expensive, especially when you are working with people who know how to get the look on a budget). And, you can do it in pieces, such as the tunic first, then the obi, then the pants, then the boots, etc. THose guys and gals at teh RL are very helpful. Personally, I would not trust Cosplaysky with putting together a plain white T-SHirt form what I have seen and heard.
Ash