Mine is an 11 not a 12, but I have used 4 Steeda tunes:
Steeda 93 octane CAI tune
Steeda (prefinalized Boss intake tune) had roaming idle issue
Steeda (prefinalized Boss intake tune) corrected
Steeda (finalized version) Ultimate Boss intake tune
I have had no problem except the one mentioned which was corrected very promptly by communicating with Steeda.
The last three tunes were sent to me by email and loaded on my SCT tuner, so its not like my car left their shop with the idle issue.
My car runs great, I highly recommend !
If you are asking because you have a problem, I say call them. They are great to work with.
They used my personal car to develop their SCT tunes with CAI for AUTO trannies. At the end of last year, they loaded their " basic tune" for the Autos, and I went from mid 340s to 365 at the wheels, and it felt great.
They had me come back in Jan, and they closed the shop on a Sat and did a 4-hour custom Dyno tune on my car, and got it to 385 rwhp with an even better "feel". They took this long so they could try some different tunes and get some readings, then make sure all the data looked good and safe.
They now use this tune as the standard Auto tune when you purchase the CAI and SCT from them. Call and ask for Todd, and tell him what you want and Rob sent you, or HMU in a PM.
I live close by so I drive there but you can get them sent to you ... Gus did my tunes, but Todd is my main sales guy..he is super cool and easy to work with ... call him if you get the SCT with CAI
RC