Gonna give you a huge tip, plus this is a debate which has been covered many times on here, I did a step by step of doing the shims a while back, the huge tip is "use TWO zip ties on each cam sprocket to the chain to stop it jumping a tooth"
Its a easy job, but is time consuming, do it yourself (Ive done a bunch of 08's and 09's) take your time and save $$$$$$ from the dealer of which the mechanic MIGHT NOT KNOW HOW TO DO IT, hey! some mechanics have never done it and have to work from the shop manual.
Do it yourself, and take PIX PIX PIX as you go along and do drawings too, those oil lines under the cover look confusing, but they only go in one way, hence PIX or drawings...
I always take pics or quick drawings, it HELPS....
Good luck.