Hi Rainady
The synergy 2 is worth the money. It certainly gives the car some ooomph! My wife drove it, safely overtook a cyclist, and could not believe how quick it took off - the passengers were a bit surprised too. But seriously, I followed roverons advice, cleaned EGR valve and PCV valve. Also as EGR was so crudded up I removed and cleaned inlet manifold (very dirty). I have also just added millers Diesel Power Sport 4 fuel additive. We use our Freelander to tow our caravan - after years of towing with a 300 TDi disco (very slowly), we have found we have loads of power and hills are not a problem anymore. I would highly recommend the synergy 2. Do not be overly worried about black smoke first of all, as ron says it is just your exhaust being cleaned out by the extra power. My settings at the moment are MAF-OFF and running on setting No. 3. Hope you enjoy yours once fitted and let us know what you think. The whistling noise is not as bad now , I tighten the long intercooler pipe clips on top of the engine and will check pipes at the weekend.
All the best Graham.