Most Favorable Treatment
Warmest Reception
noun
The most superior treatment is another way of saying it's the most favorable treatment you've ever received. It's when you get the warmest reception out of everyone around you. Like they think you're the president or something. Either way, it's pretty great!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
最優遇貸出金利はいまどのぐらいですか。
How much is the prime rate right now?