Some of his 'customers' (victims) have received refunds, the vast majority have not. Tsai is no stranger to a multitude of firearms/military-related websites and has ripped off DOZENS if not hundreds of forum members.
The most feedback regarding George Tsai can be found at AR15.com and SIGForum.com, where he was the most prolific. It was, in fact, the combined effort of SIGForum members and Det. Gubernet that finally brought criminal charges against Tsai that were successfully prosecuted. Tsai was recently arrested and jailed for approximately six (6) months for his shenanigans, and now released, still attempts to sell items online and has been caught using multiple user names to re-register on the same forums he's been booted off before.
Please feel free to check my post for veracity by visiting the aforementioned forums.
You will also find crooked dealings by Tsai on glocktalk.com and even officer.com