I have had my 2015 JGC Summing Eco Diesel for about 8 months now. This is the longest I have ever owned any vehicle without making any mods to it. That changes now. I just purchased the GDE hot tune and transmission tune. I dont think I have heard a single negative review on this tune so I am going to make it happen. I cant wait for the module to come in. My JCG is still under factory warranty with an extended Mopar warranty so I am keeping the stock ECU just in case. It is not the fastest vehicle I have ever owned but is in my top 2 or 3 favorite.