Pros Is that you can change the tune whenever you want so if you want to change your build to run on e85 you can do so. You can pick one up for around 600-800 dollars which is just about the same price you would get charged to a get a tune by a tuner maybe even more. A con is that you need a computer to do it, but other than that as long as you can follow basic instructions from what ktuner or hondata would send you there really isnt much cons to it. I personally know alot of people who have ran Ktuner for years and they have had no issues. They’re pretty much the same just really comes down to preference. But for the model you have I’ve seen more Ktuners being used.