Just ordered myself the FT level 1s and I'm not sure whether or not I should keep the cable covers on. Ive heard people that like em and people that dont. This doesnt have to be just about the level 1s though, theres cable covers on other boots too so go for it, whats your opinion?
"What I care about is being able to click into my skis for the rest of my life. I care about being on top of the mountains with my best friends. If I'm on my skis, I've got a big smile on my face. And I want to keep it that way." T-Hall http://vimeo.com/thenewsolution
Seems like nobody really answered your question... They barely do anything so it's up to you and what you want. The only thing they do is they kinda keep the cables in place so putting them on is a tiny bit quicker. By "in place" I mean over the correct bump things on the tongue.
"When it comes to skiing, there's a difference between what you think it's going to be like, what it's really like, and what you tell your friends it was like."