I have to say I've had a great experience with Turbonetics so far. I've had quite a range of aftermarket experiences, too.
If I have to think of an improvement, it would be to make new customers more aware of this forum when purchasing Turbonetics products. I found it by accident from a ScionLife member and fellow tC owner.
However, I am also not going to complain about this GREAT "well-kept secret".