Serato Sample is powered by Pitch 'n Time, which means the time stretching and key shifting is extremely high quality.
You can now slow your sample right down to extreme lengths and it'll still sound amazing. This is great for sound design.
The Key detection and shifting allows you to easily see what Key something is in, and also instantly match different samples together by making them the same key.
Check out the video below, for more info and tips on Time Stretching and Key Shifting;
Or check out an example of Pitch 'n Time in action;