Do you any of you guys have a g-tech? A friend at work got one and I'm going to try it in my maxima. He said its not very accurate. what do you guys think. I can get one off ebay for a little less then $100 I think.

 

They are very accurate, to within 1/10th of a second. People who've used them at the dragstrip can attest to this.

 

I've got one and it was .1 to .3 off at the dragstrip.