I purchased a DTUK CRD3+ with the Bluetooth option for my Tiguan R-LINE TDI 4MOTION around 8 months ago and it’s been a revelation, from my initial enquiry and purchase through to fitting, and of course the results. The support and advise that Adam and Andrew gave throughout was more than helpful as they didn’t make any wild claims, they were just very honest about what you can except to achieve. The results were actually better than they suggested. On opening the box, the instructions are easy to follow and it only took me around 20 mins to fit and set it up and then we were away. Since then, I’ve seen a dramatic improvement in acceleration and overall performance but equally I personally have also seen an increase in fuel economy of around 8-9%. I average 85 miles a day and it’s paid for itself in that time. You still have to maintain reasonably sensible driving habits, but the benefit is you have the increase in power and performance which means you have less need to drive the car hard but when you need to move you can. It’s no surprise that the after sales support is excellent as well. Andrew and Adam are happy to answer any questions or offer any advice when you ask for it. Adam and Andrew are the real deal. I can’t praise them or their product enough.