The resort opened to the public on March 1, 2009.
In October 2010, Penn National Gaming bought the resort's $860 million in debt from the Bank of Scotland for $231 million. They then acquired the property the following June, in exchange for canceling the debt. Marnell remained as president, but with no ownership.
State-of-the-art technology, with Crestron touch systems
Private Wine Cellar & Tasting Room
100,000 sq ft (9,300 m2) pool and entertainment piazza
Mercedes Maybach house cars
The hotel was featured prominently in Top ChefSeason 6, in which the M served as the location of the Top Chef Kitchen, as well as the setting for many of the challenges. The M Resort also gave away cash prizes to the chef'testants throughout the show, ranging from $10,000 to $30,000 for the final Las Vegas challenge, Culinary Olympics. Chef Kevin Gillespie took home the most money, $65,000.
For Christmas 2009, the resort placed on display the tallest Christmas tree in the United States. The 109-foot (33 m) tree was lit in a ceremony on December 12, 2009. For the last few years, a tree at Fashion Island, an upscale mall in Southern California, had been the nation's tallest.