im interested in switching sticks and been toying with the idea for a while but ive gotten used to them, the only reason i wanted to was because at first my thumbs used to slip off especially when playing games such a FIFA. Not been much of an issue now and i dont have the grip wearing down like others do.. but i prefer taller sticks like when i used to have a Xbox 360 and Kontrol Freekz just made it a little bit easier.
Just grab the sticks and give them a try. If you do not like you can always swap them back the controller is very easy to take apart requiring only a small Philips screw driver. Just take care with the ribbon connections and remember the re-set button that will fall out.