From my experience...I have an SE5, 2008. The parking brake worked perfectly. The dealer said I should have the "fix" done. Well, the "fix" was an "unfix". Worked like crap after. Finally had someone who knew what he was doing fix it correctly. Now it's good. Also, a fix anyone can do to help the brake lock and release easier is to spray some oil on the key/spring that locks into the notches as you apply the brake. I know it sounds stupid, but do it and you will see what I mean.
So, in summary, I guess that I am just suggesting to you, "If it works, don't fix it!"