it can suck Daz, i'm out of it at the moment, when i was i always tried to make sure everyone left happy, sometimes it hard, a lot of people have a car they don't understand, thats why they take it to a pro, when they get told something they dont like then all of a sudden they know more than the tuner....
i wish people would realise that most tuners are a small company that may not be perfect 100% of the time, but if you bear with them & get on with them then life is so much easier for both partys, how many people leave a company unhappy, don't say anything to the company but post it on the web when they get home!