I've posted this before, but I'll mention it again.
Now I know that a few people have been there and had good work done, so it's possible that they have had a change of ownership since I had my car there....
I had some intercooler pipework done there, only needed 2 pipes about 2 feet long with two bends in each welded up.
They charged me $400... Plus the weld joins had 3 leaks in them.... Plus there was an extra 13km on the tachometer.... Plus the clutch was slipping when I picked it up...
I don't think I'd go back there again.
Some places might be the cheapest, but it might be worth paying an extra 5-10% to a shop you can trust.
I've been to Powertone twice now and I'll go back there again without hessitation.
J