ive used uber, crome, and hondata s300....im out of hondas now but if i ever build another s300 is the way to go...you can find a used set-up installed in a ecu for around $450-500 if you look and its so user friendly. if i had my choice it would be crome or hondata.....i know a guy that has used neptune and he swears by it....ive never used it so i cant say anything bad but most ppl will tell you to go hondata or crome