The decoke was complete 2 weeks ago - Lexus had the car all in for almost a fortnight but now I've got it back the difference is fantastic. They advised me it would be like having a new engine, well, they were right. The engine ticks over almost silently, it has a lot more power at low revs and pulls from 1100rpm and the mpg is back to where it used to be, around the 40mpg mark. Very pleased!