I will be going to Vegas for my first time in October. I was wondering which company or hotel has the best return rate on comps. I will never play enough to get any type of room comp, but what about a meal comp, or money towards a meal or buffet. Are certain Casinos better then others? Do the rewards carry over to sister hotels (Do Mandalay Bay, Luxor, and Excalibur all combine their comp points?) Thanks for any info!