GM performance parts, any good?

As most know by now I am looking into a big turbo project overhaul, including major upgrades to the engine. Would/Has anyone had any experience with GM performance parts? Seeing as most of their parts will not void my warranty, if their parts are good I would love to go that route, perhaps I should just get in contact with my local GM dealer, but just seeing what everyones opinion is...fire away....

[alero_ecotec]

do you have a website for the GM performance parts for the 2.2L ecotec?

[Redog]

I would say go with GM for your supercharger. It probably won't void your warranty and you know it's done right, since they know the GM motors

do you have a website for the GM performance parts for the 2.2L ecotec?

GM Performance parts Late Model 4-Cylinder Powertrain

FYI:

What is the warranty on Performance Parts?
Due to the nature and intended use of GM Performance Parts, the parts are sold without any expressed or implied warranty. If a GM Performance Part proves to be defective following the purchase, the purchaser must contact the selling authorized GM Performance Parts dealer to resolve the issue. To find your local GM Performance Parts dealer, please use the locator at the top of this page.

Although I'm sure there'd be something you could arrange with you local dealer.