I had a problem with my 2014 Cascadia and I sent my cpc4 in to get tested. Testing was quick. They got back to me within a day of receiving the package. When they told me that it needed repair they were also quick with that. The same day they fixed it! I'm glad they work pretty fast because I could not allow too much down time from work. After they repaire it they sent a video to show the computer working in one of their trucks, they didn't have to but they did which is good. It's been about 2 weeks since I brought it in to get repaired and it is still going strong. 10/10 would recommend, one for their price, but two for how they showed the problem fixed and how fast the turn around was.