They only compliant I've heard about the case is the cable management and that the hard drives can only be arranged with the power/sata cables facing the window side. Instead of being about to run on the back side of the case.
I think the case is one of the best looking on the market, but for 330 dollars seems a little steep for a case that is almost 2 years old. Seems like Silverstone should upgrade this case with better cable management, powder coated black interior, and hot swappable drives like on the FT01. Also I bet the larger fans in the FT01 could fit into the TJ10 for better air flow. (hence instead of a 120mm fan sucking in air for the GPU put one of those 180mm.)
Does he have any pictures of his build?