I sent them my turbo for a rebuild after eating part of my MAF. They did the rebuild and sent it back to me in a fair amount of time.
BUT
I asked if there were any upgrades. For about an extra $100, they did the "stage 5" upgrade (what ever that means) to the turbine side after I ate part of my O2 sensor. And this involved machine work on my turbine housing. For the compressor side repair: First they told me there is nothing they could do, then they told me the only thing they could do to upgrade the compressor side would cost $750!!!! That is what the whole thing cost new!!! So I said just do the rebuild. Of course after the job is done they tell me story number three - you could have used .... for just another $150. What a bunch of chumps - that is what I was asking about in the first place!
Then when I get the turbo back, there is no gasket for the wastegate plate. They say sorry they will overnight the gaskets. When the parts came I was at work and had my girl go to UPS to pick up the parts; something like $15 for shipping and $10 for the gaskets. They would not take a check for the parts, my girl only had $20 cash on her. UPS said if I called Turbonetics and had them call UPS with approval for a check, they would take the check. Turbonetics said it is not their policy and would not accept a check for about $25 for a few gaskets that they should have provided in the first place!!! I told them to forget it - refused shipment and ordered the gaskets from one of the favorite Buick vendors around here. - SCREW THEM!
That should have been a simple thing - But they pissed me off so much with their attitude that I am through with them.