http://foc-u.co.uk/index.php/topic,66.msg200.html#msg200This link shows how to fit the FCE, I used this to fit mine.
Some owners do not find the throttle snatch bothers them, the smoother you are on the throttle the less you notice it.
They are quite pricey, about £180 new,I was lucky got a new one for less than half price from someone who had bought it and never fitted it before he sold the bike.
In my opinion they look a bit cheap,like something from China, the bullet connectors should be multiplugs to match the bikes existing multiplugs.
Saying that on my bike I did notice the difference after fitting,but it was not totally eliminated.They are also meant to give an 8-10 bhp boost in the midrange but I never noticed it and it did not show up on the dyno when I had my custom fuel map done.
If I were you I would ride the bike for a few months and see what you think before you made the decision about whether to buy one or not.