Just got my LS back from getting all the plugs and coils replaced. Drove fine on the way home, no more hesitation but it wasnt enough driving to get on it and feel the difference. They gave me all the old coils and plugs back. I was interested to see how the plugs looked as only 2 were new, the others had 111k miles on them. I think out of those six only one looked kinda nasty, the others "looked" ok. One interesting thing was they noted that four coil connector clips were broke, but they have been the only people to replace the coils. I guess i can accept that over time and so many swaps those clips can break. Crossing my fingers that this will be the last time i will have to mess with the coils.