I uninstalled my CPE-CAI recently as the dealer would not service the car with it there. Mainly because I was having evaporation canister issues and I guess they cannot diagnose the engine unless it's stock. They ended up replacing a purge valve I think. I was getting a CEL about once a week and the car was stalling a lot after getting fuel.
The CAI came out very quickly, about 1.5 hours for the uninstall and the Forge valve also. It'll go back in again soon for the summer, but for now it's a pleasant change to have some peace and quiet...