Assuming all prior maintenance has been conducted following KIA's plan, your warranty should stay valid until the conclusion of seven years. It seems improbable that you would abruptly increase the mileage to exceed 100,000 during the remaining period.
By wisely purchasing an EMaC service package, you are enjoying a significant decrease in standard service costs. Service number 4 is substantial, however service number 5 requires far less effort; I cannot see how they justify a fee of £323. Preserving the KIA warranty for the full duration of seven years is essential if you want to retain the vehicle long-term; thus, I trust that all prior maintenance has been conducted at the appropriate intervals within the KIA dealership network. KIA would want to meticulously examine any invoices for services conducted outside to identify potential justifications for denying a costly warranty claim.
I anticipate that if the vehicle is scheduled for the morning opening, it will be returned between 1000 and 1200 hours. I often leave the vehicle, observe the news on the television, and have one or two complimentary coffees before exiting to have breakfast at a local restaurant. At times, I have gotten a call from the dealer's receptionist before I have completed my meal.
I consistently take the complimentary wash and hoover provided, since I am not too concerned with maintaining the cleanest, shiniest vehicle in the community. This likely adds around 15 minutes to the duration. A brief inspection of the cabin filter, if included in the service, will provide insight into the thoroughness of the work conducted. On one occasion, I raised a concern, and when the photographic proof revealed the soiled filter, the service manager profusely apologised. Subsequently, when the vehicle was little more than six years old, I submitted a claim for a malfunctioning rear camera and retractable baggage cover. Since the KIA dealer had exclusively maintained the automobile, the process was executed promptly and without dispute.
Best of luck in ascertaining if your selected dealer does the necessary tasks, since some, like all brands, have been known to compromise on some aspects of the job.