I haven't heard of a single complaint about Peter. Every experience I've had with them has been positive. They are a bit expensive for my car though.
Being a Greddy dealer, you can expect where their preferences will lean.
One thing I'll say is that in Sydney, we're a small community... many of us have done work at lots of places and we have impressions of each workshop.
I know Brett has done some work with Bel and everyone has heard bad stories about particular companies. For some of the suspension work on my car, it went to a specialist.
Moreso with stories like 'I'm with ABC tuning rather than XYZ due to a bad experience'.
I know some people have some choice things to say about a place near UAS.
At Bel I think some 'white folk' have a harder time there but from what I've seen, Ben, Eric, Brian are fine with everyone - they've done some inspection work ('PPI' - "pre-purchase inspection") on GT-Rs so there some trust there. That's the strange thing, they wandered into Skyline work... they used to be mainly Hondas and Subarus.
I gotta admit the workshop is laid out like the places I've seen in Hong Kong so there's no culture shock for me - it's also comparable to many other places I've seen in Sydney.
The rebuild work on my car is perhaps not a great guide as the internals were chosen by me and outsourced - an the thing still does single digit knock figures with a PowerFC.
T.