1200 Rr Exhausts

Hi, apologies if this subject has been raised before...couldn't find anything, but has anyone fitted a Racefit exhaust to their 1200RR. I've been looking at alternatives to the stock exhaust and Racefit seem to be a good quality replacement and I like the look of the Growler, but would be interested to see if anyone has fitted one of these and wishes they hadn't or glad they did!
Also I know this has been brought up, but stock mirrors are dire, don't fancy bar end mirrors, does anyone know if you can extend the stock ones, had a good look but couldn't see anything,
Cheers
Rich