A regular 155mph with my 92 LS400. Acceleration up to 120 was great, and pretty smooth and quiet up to max. speed. Unfortunately, fuel supply gets cut-off at 155, otherwise I'm sure they would go a bit quicker. Had to move over for a couple of Supras that were doing at least 170 from the way they boosted past.
Drove up to Scotland once, was sleeping in front seat. Woke up to find my friend had the car at 145 on cruise control.