Found a couple links from another forum. So far I haven't seen any complaints about Seth or Sean. From what I understand, Sean is concentrating more on his other job, so he doesn't work too often. Not too sure about Seth, I know his shop gets a lot of business though, not just tuning.
shop recommendations in hawaii? - MY350Z.COM Forums
Sonic Motorsports. Good with Tuning VQ Engines? - MY350Z.COM Forums