Thanks for the reply. They list impressive results with all the cars listed on their web site. I was hoping someone that is using this could report what their impressions are?
Almost 10 years late here, but I have been using a RaceChip for almost a year and there is a difference on my post diesel-gate JSW. There is less clacking from the engine and it feels smoother. There seems to be a better overall driving experience with more power. These claims are obviously of my own opinion from my experience. No proven results as I don't think it's worth putting on a dyno.
This is a good option for those of us with the post diesel gate cars so we don't void our new/extended manufacturer warranty. However, Kerma makes a remap for this and the DSG with both to be had for about 1000 USD, maybe less. Both options allow for more performance without compromising the emissions.
The Kerma tune is around 5/600 USD and my RaceChip was half the cost, and it only makes sense to get the device if you only plan on getting the lowest model, as the top model of the tuning box costs just as much as the Kerma tune.
I bet you could get a sportier feel with just the DSG tune, instead of any box or engine tune that hardly gives any real measurable performance.
My JSW is lowered on sport springs, so almost no real drop, but with the power of the TDI, the DSG, and the sportier suspension, really make this car fun to drive.
Finally, I unplugged my RaceChip for about a week at one point and didn't like the experience so I ended up plugging it back in and adjust the setting to give more fuel. No noticeable drop in economy, but no gain either.
So that concludes my ten year later 2 cents.
