Some key points I have discovered:

Cost $200 which comes with a free weekend night.

Guaranteed room upgrade
Fresh fruit upon arrival
In-room water
In-room gift
Single-room rate for double occupancy

Extended checkout—up to 4pm
Dedicated Ambassador check-in area
Complimentary pay-TV film per stay**
Complimentary newspaper, delivered daily
Instant checkout

Complimentary weekend night certificate*
Elite status in IHG® Rewards Club
5,000 bonus IHG® Rewards Club points
Redeem points for rewards, including free nights

https://www.ihg.com/intercontinental.../en/ambassador