It"s a personal choice. I had a RK 15 years ago with PCIII that was perfessionally tuned that ran exceptional, great mileage, smooth power over the full range, just a great running bike. Then I bought the new SEEG and dealer said let me put in HD download, if you don't like it I won't charge you, It was not a good as the RK but I paid around a hundred vs $550 on RK for tuner and dyno time, so saved $450 and it was OK, not great, OK. Bought the SERG and went Fullsac inserts with TTS and Fullsac supplied map, much like the old RK it was just a fun/smooth bike that I enjoyed riding and only cost around $450 with cables. Good deal, then I paid a famous Florida tuner (name withheld) $400 to totally screw it up to the point I hated to ride it, after his third attempt I reloaded the Fullsac map and left it alone till I sold it 5 years later. On the new CVORK I installed the Fullsac baffles and have a FP3. That is it, no more dyno tunes for me, no more letting somebody beat the crap out of my bike for a couple HP, just not worth it. I am old enough peak power is not as important as a smooth rideable torque curve and with some of the technology in the current tuners it is just not worth the money (to me) for a (word overused) "tune". IMHO. The new bikes actually run very good, I heard alot of people @ Bikeweek in the tent after test rides that were amazed how good they run vs a few years ago and I agree.