I have a 2015 1299s and I ride the shit out of it. Its an amazing bike, if your not used to twins it will take some getting used to. Yes there is some heat from the exhaust and parts are expensive. If you're just going to commute and hang out at starbucks, dont get get it.
The bike is magic and gets better the faster you ride it. Half the stuff i read posted is horse shit.
GEN 4: Brembo HP calipers, Brembo HP T-Drive Rotors, Brembo RCS master cylinder, Fren Tubo SS lines, re-valved Ohlins damper, Ohlins TTX shock, Yoshimura case covers/frame sliders, Yoshimura 3/4 R77D Ti exhaust, BMC filter, Puig DB, Renthal Clip ons/sprockets, attack rearsets, Guhl flash, kawi kit throttle, Ballistic EVO2 8 cell, Annitori RL quick shifter, Dunlop rubber.