I'm not a huge fan of Morongo, mainly because I never win there.
That being said, for slots, they still have a number of Class II slots so be careful what games you play.
You have one of the largest outlet centers in SoCal so there is something else to do besides gamble nearby.
Excellent food selections, from quick service to fine dining. I would say more choices than than Harrah's or Pechanga.
They have a tubing pool which is kind of cool.
If I would ever win there, or they at least comp me a buffet (never happened), it might become my favorite.