Originally Posted by breakthrough37

This is from the Marriott’s website
”Experience the ultimate convenience and enhance your reservation with Guaranteed Early Check-In.If you are an early traveler eager to settle in or seeking to maximize your time exploring local attractions, our seamless Guaranteed Early Check-In ensures a stress-free arrival—granting you access to your room as early as 10:00 AM.”

There a section on Reddit on Marriott.
Most subscribers are not very happy about paying a fee for early check-in. What upset one subscriber with a noon check-in arriving early. The room was available. The hotel wanted to charge a fee for checking-in two hours earlier.