My 14 FR-S is automatic and I have JRSC installed for over 3 years and 35K miles.
There are reviews below. Whatever your goal is, track or daily drive, this the best option I could see for reliability and power. Stay with the stock engine, buy JR tune, don't add any more power than the kit offers, just add an oil cooler (JRSC has options for that). You are all set.