Good value alright, I checked the cost for my 500 and its 129euro. A few questions - What are the internal adjustments? Also, how does it work with eco mode or does it only replace normal mode, can you bypass? Thanks, look forward to hearing how you get on with it.
Open up the box with a torx screwdriver and there's two dials, one controls how much extra boost the box will give you. It's set to give just below 20% when it arrives, but that can be increased or decreased by roughly 1.5% per step. The amount of boost each car can take varies: too much and the power delivery becomes jerky. So you may be able to push the power up, or have to dial it back depending on your vehicle. Mine was fine at the default setting. A more moderate boost may be better for economy judging by more advanced boxes which offer multiple modes - eco (moderate boost best economy)/sport/all out race.
I've not tested fiat's eco mode with the RaceChip yet but it should show a similar percentage increase in power. Users of this type of box have reported that eco mode with a tuning box is like normal mode without it.
There's no way to switch off or bypass the tuning box - you have to remove it, but RaceChip provide a dummy bypass module that you can plug in, in place of the tuning box. This means that if you do remove it temporarily, you can leave the wiring harness in place so it's much easier to reconnect.
There's lots more info on the racechip website.