jason im sure many are aware of your gripe with mercury, and yes i can sympathise with you, i have had minor problems with them in the past, and yes, this time i didn't get the perfect treatment or results i wanted either, but overall im satisfied with the work they have done.
but i dont think they exceeded their quote by an unreasonable amount and all the extra work they rang me about bar the gfb valve as i just said before.
I'm happy with how the car is going this far, and although its easy to say the tune 'could be better' but it could also be worse too. And i was very specific in my instructions to go for a very conservative reliable tune so that should be kept in mind.