The self learning kits are for a lot more then just driving to the local cruise that's for sure. The FAST kit I have some experience with tells you what's going on under the hood via little screen that plugs in. Can tell violent temp, a/f ratio and adjust the same. Talks ya where the position of the iac and s few other things I know I'm forgetting.
Like I said I've heard good things about MS set ups. The site is very confusing for me. They say it's easy to set up but personally I don't know. Never seen one in person. I do know a few guys running fast set ups that love them and have seen huge improvements everywhere with it
