I had the first one and it's been fine,most of the problems people have is that they are not professional mapper's and do not fully understand the full spectrum of mapping,dont get me wrong there are people out there who know a hell of a lot(danny) but when it comes down to the finer details which are normally the most important thats where it starts to all go wrong and it's not the ecu but the operater thats why i leave it well alone