I run SSi, and you will find a bunch more people who steer you away from them for various reasons, but the biggest is because the second SSi gets mentioned anywhere, we get banned and kicked out. Sooo you won't find a bunch of us with high mileage to talk to. I will say there are plenty of people who have and are running their tunes for lots of miles and safely. I'm sure the guys on here would know, but so far I have not heard of any failures on our platform from SSi. And as far as the knock sensors being turned off, after I ran my 12.28 tune only, I sent a log of that tune to a very well known Unleashed customer to see what I was dealing with. He told me it was actually safer than his Unleashed tune, and was expecting it to be much more on the edge. In fact to the point where he actually has one of the SSi race tunes as we speak. He has verified my story in a couple places that are NOT SSi friendly... Believe me if my sensors were shut off, I would have blown to the sky by now! lol