i recently got an e-tune from brewed motorsports for sr20det with aem standalone running map instead of MAF, and all i can say is i am suprised at how good my tune is being its an e-tune, i was expecting it to not be that good, but it ended up being great. i my car 1000 miles during a road trip from mississippi to Pennsylvania on the tune without any problems, and i was also getting better gas mileage than my wifes kia, plus had plenty of power to merge into fast moving traffic. the process for the tune was quite simple, all i had to do was email datalogs and they would send me a revised map. if you want to know more, i believe his screen name on here is tunermt, or you can just go on their website
Brewed Motorsports