I recently purchased IE stage 1 tune with cable for my 2013 Audi tt quattro after trying to decide who to go with IE vs unitronic. James was a huge help and guided me through the process through text and gave his personal opinions on things and that helped with my choice. He even went as far as sending me 2 separate links ready to purchase so when i made my decision checkout was as simple as clicking link and paying. As far as my purchase I could not be happier! The difference in power is way more than I thought it would be. I only have the neuspeed intake and a magnaflow exhaust on car but after tune the smoothness in acceleration as well as throttle response is perfect. It was my first time tuning a car and was a little nervous but process was simple and straightforward. If you follow the prompts on your laptop (including hooking up battery charger) entire process took me about 25min. If your undecided on who to use for your purchases and Urotuning has them,go with Uro. Their customer service and ease of purchase is like no other. Im 40 years old and been into the car scene since i was 18 years old and never had knowledge or service like them! Thank you Urotuning