Thanks guys. I wasn't planning on getting one, but someone on teamzx2 got one and swears by it. I think he believes it works because he spent money on it. And in theory it would help. Sensors are very voltage susceptable. For instance, trying running you car on a dyno off of the battery (12.5v) without the alternator (14.4v), you will have some serious power issues. On that same note, I had done some calculating on the subject a while back when I was thinking about adding a cap off the battery to do basically what this says it will. You would need at least 10 farads to make a difference!!! Thats WAY more that this could be, it looks to me like those would be somewhere in the 400uF range or so.