I don't have my 11th Gen tuned yet, but I did have my 10th Gen tuned. If you are looking to make more power and and wake up the car, its the best bang for your buck modification. The CivicX and CivicXI forums have some pretty good posts about tuning. I would also recommend looking at Ktuner as well. Phearable and Two Step Performance offer off-the-shelf tunes when you but a Ktuner unit. I personally have a KTuner V2 and love the unit. I don't have to bring my laptop out to the car with me and I can monitor the engine from it.For those who own a flashpro or at the very least have had their civic tuned, is it worth it? Started doing some research on tuning in general (wasn't a topic I was ever knowledgable on) and It seems like a good investment but hearing first hand from owners seems like a good bit of information to have first.
The Tuned CivicX Experience & Reliability Thread
The Tuned 11th gen Experience & Reliability Thread
Phearable.net: Honda & Acura Performance Solutions
Two Step Performance: Auto Parts for Honda, Subaru & More