Purchased a Tunit for my Renault Clio in summer 2007. Found the installation easy despite being far from a mechanic! The staff were happy to talk me through any questions I had pre- and post- purchase. Unfortunately I was involved in an RTA in the Clio and have since bought a diesel Leon, which my particular Tunit does not fit. Obviously this is an unforeseen circumstance and I would imagine had I had the luck to continue with the Clio for a long time period as I had expected, the Tunit would have performed exactly as described on the site. I found fuel economy to be only very slightly improved (although I did upgrade to larger alloy wheels around the same time so this would undoubtedly have increased my fuel consumption from the original wheels), and I found a marked improvement in engine performance.
Colin,MG ZT 2.0 CDT
Unfortunately I cannot receive Men and Motors, but fortunately I do have my own Tunit device fitted to my MG ZT! and so together with my American car Hi-Fi system I can enjoy my own roadshow every day! What can I say, the V-CR Tunit device works exactly as advertised (how many products can you always say that about) and more. The engine now operates in the way the go faster looks and rear spoiler that were original to the car suggested it should. The pick up and acceleration are nothing short of phenomenal and the engine is turbine smooth and almost silent whilst cruising. The fuel consumption remains unaffected and driven with slightly less gusto is marginally better than before. Thank you for bringing such a brilliant device to market. A definite must have for anyone with a turbo diesel who wishes to exploit the vehicles full potential at such a relatively low cost witheasy installation.