As already said, there are many horror stories to be heard from Arnold Shark, and they dont have the best of reputations in Scotland. Not sure whether this is true or not, but i was told they recently paid a website devoted to bad customer experiences, to shut down.
Balance this out with the fact that they are Europe's biggest independant dealer, then there has to be a lot of bad stories...its the nature of the business.
Some personal experiences i know about -
I went with my dad to look at a brand new Civic in June 08....was a 1.4 SE+ model, looked beautiful so he done a deal to buy it. He picked it up just over a week later, drove it straight down the road(2 miles)and into his garage. The next morning when he opened his garage, he could see 2 deep gouges on the right hand corner of the rear bumper, so he immediately phoned the dealer.
They said they were not aware of any damage being there when my dad picked the car up, and implied that he might have done the damage himself, but told him to bring the car in and they would look at it.
Now...under the circumstances, it was completely obvious that the damage must have been there when he picked the car up, and after some deliberation on the dealers part, they agreed to fix it free of charge.
An important point to note on this, with the benefit of hindsight....when my dad picked the car up, it was parked in such a way that walking round the back of the car was impossible.
I told this story to a friend who is ex-motor trade with many years experience, and he said that this sort of thing is not uncommon - in certain circumstances, dealers will be aware of damage, but hope the customer does not spot it until its too late.
When my dad took the car back to the same dealer for its first service....he gets a phone call from them later in the afternoon - they have had an accident and have damaged the rear bumper! They reversed into something and was going to require a whole new bumper. To their credit, they collected and returned the car the following week, and the service was free of charge.
A friend bought a 1 year old Focus 1.6LX from the same dealer. The car had to be recovered a couple of days later..it needed a new water pump. The problem took weeks to be rectified due to Arnold Shark arguing with the local Ford garage as to who should pay for the repair. They wanted it to be a Ford warranty claim, but Ford refused. Then a couple of months later, there was a noise coming from the back wheel....so my friend took it back to the dealer, who said there was nothing wrong. When he asked about the loud noise, he was told the mechanic test drove it and it was only "wind noise"

They refused to do anything about it, so my friend to it to a local fast fit outlet, who immediately said it was the wheel hub that was at fault...cost £200 + to fix.
He got back to Arnold Clark and told them what the problem was, but they still refused to do anything about it, saying it was a wear and tear part.
So much for "wind noise" then.