22nd Nov 12 “Firstly, amazing after sales service from Andrew (the proprietor of DTUK)even when I’m 8000miles away in Asia. Placed my order and the unit came without any hitch within days of placing my order. Installed it immediately after receiving my DTUK unit into my 2011 BMW X1 20d xdrive. The unit came preset to map 1(it has 4 maps with fine tuning ability). Installation was easy breezy. Took me 15 minutes. The effect was immediate even with map 1. Loads more responsive compared to stock. After a day I moved on to map2, even better responds and better generally throughout the entire rev range but subsequently settled on map 3 which gave me exactly what I needed, great response down low and a thick amount of torque between 25004500 rpm which gave me plenty of headroom when overtaking on the highway which constitutes most of my driving. Best aftermarket investment I’ve made thus far and my x1 20d feels more like an x1 30d if not better! The best thing about this is that i can remove it anytime (takes less than 10mins) when my car goes in for a service without voiding my warranty. Gives whole new meaning to having your pie and eating it too. Now all that is left is for me to convince my wife who drives a f30 320d to get one for her car but it’ll probably be too much power for her to handle.”Alex.C