This garage claim to be a Porsche specialist but they are rip off merchants and should not be allowed to be in business. Our car, a Porsche Cayenne, had a horrible knocking under the car and we took it to Jon Mitchell's to get it fixed. They had the car for weeks and at the end charged us in excesss of £5000 - for fixing the knocking plus a lot of other work we had never authorised!! On leaving the garage, we realsied that they had not fixed the knocking whatsoever as it was exactly the same as when we took it to them...and we... read full review »