They used the same buses during the initial construction of the LINK train. They are large and are a lot better than the ones run by the private lots. I was once on the ParkNFly shuttle when the driver fell asleep at the wheel. The Viscount lot was run by Impark until last year, and there was a real problem with paying and getting out as well as blockages and poor signage. Now, they have pre-pay machines that speed things up and the garage is finished.