Been going to MoSun for years.  We really enjoy the restaurant Tuscany's.  The last year or so, the slots are just not paying.  We often leave $2-300 down.  A friend said that Foxwoods slots were better.  This past Labor Day weekend we headed over to Foxwoods with another couple.  We hadn't been there in years so the expansion that has happened was impressive.  I still like MoSun's atmosphere for gambling/dining better.  BUT... we walked out of Foxwoods over $300 up.  We played for over 6 hours.  While there was ups and downs, the slots at Foxwoods definitely have a higher pay percentage.  There aren't as many newer flashier slots like Game of Thrones like at MoSun, but overall Mohegan Sun really needs to up their pay schedule on the slots, or they will keep losing customers to Foxwoods.