[Tony500]

I've had two from racechip before, one for the V70 and one for the XC90. Both were around £350 each with bluetooth control. I never seen any performance gain or mpg gain whatsoever. I ended up going for a remap for my V70.... That was the best option. Although they must work to some degree or they couldn't sell them? Many do praise them and many slate them..... Go to a proper tuner and see what options they have too