Just got my Tom's TCU installed yesterday over at VIP Auto Salon. Took Clark about 10 minutes to install (its a plug and drive system) and all I need to say is WOW... if you don't have this already, i would highly recommend it. It isn't going to give you any HP gains but, the change in the response of the car is crazy. Makes the F feel like a completely different car. Get's rid of the throttle response lag the Lexus cars are known to have. A stock F with this installed will definitely beat one without it installed off the line and the track (not due to power but just due to the increased response). Already have my Tom's air filter and am getting the JoeZ intake installed today (got both of those from Clark at VIP as well). The unit lets you choose between four settings and is such a simple install process... definitely worth the money in my opinion. Only thing left for me is an exhaust which I hope to get soon.