Tuning XC60

Dear Volvo colleagues, I had my car (XC60 D5 automatic, 36,000 km, year 01/09) tuned earlier this week. Before 185 hp and 400 Nwm, now about 210 hp and 450 Nwm. You can notice the increase in power over the entire speed range very clearly and it has accelerated a force like the car in any speed range. The consumption has reduced with the same driving mode by one litre (previously after the tuning about 500 km). before tuning took about 37 seconds to reduce the speed without using the brakes from speed 100 to speed 30, after tuning the car needs about 45 seconds for the same exercise. I think this has something to do with the now significantly higher torque, or what do you think about it? In my opinion, the tuning has already been carried out proficiently (costs 600 Euro) and thus took about 2.5 hours. On the one hand I am I am very impressed by the increase in performance, on the other hand I miss a little more clearly the braking effect of the engine (is practically in stop and go traffic) … I want to drive with the car still about 50,000 km and hope that the engine and the drive can withstand the higher performance without damage. If you have had bad experiences please report, because this is not important to me. I now have a month to get through the free “downsizing” Good advice is now required… Ask for your opinion, thank you. Lg Michael (I know the warranty for the engine is extinguished!)