Went there today around 1pm to do carbon cleaning. Mr. Wai was very friendly and i just waited 45 mins for it to be done. He explain alot of everything and keeps promoting engine products. Haha. Anyway, my drive home is actually smoother and lighter as i do not have to full press my accelerator pedal all the time just to get the "kick". Highly recommended for cars of any age. Give it a try and you'll definitely feel the difference. =D