I have a Suzuki Swift 1.3 DDiS which I bought in 2007, its fairly brisk but I still wanted it to be that lil bit faster, so i thought of purchasing a tuning box, choices were as follows: 1.Pete's Tuning Box 2.Spider Tuning Box 3.DieselTronic By Race Dynamics I went for the race dynamics because at 20k it was substantially cheaper than Pete's(at 34k), and offers four selectable maps, via a bluetooth enabled remote. There are two power maps, one stock map, and one economy map, you can switch through all of these on the fly(while you're driving), which made it appealing to me. The nice thing about this setup is that anybody with a mechanically oreinted mind can complete installation in a matter of minutes, as its a bolt on part. Theres no need to cut any wires and it looks like an oe kit. After installation, I feared the improvement might not be noticeable, and it was, in the power maps, the part throttle response has increased multifold, in stock the power started to taper off at about 120kmph, but in the power maps its strong all the way till 145kmph. I haven't timed it yet but i will soon. In the economy mode, power delivery is sluggish as it kills the turbo spike but pays off at the pumps, which i got 21kmpl in city which i usually get 17. All in all, i think this has been a good investment. It gives you max bang with minimum invasive work, which i think we all prefer. The unit is detatchable, at which point it will return to stock settings. There is an indicator on the unit to let you know which map is running just in case you are confused. And it works with all common rail direct injection vehicle and is not manufacturer specific so you can retain the unit when you sell the vehicle.