Guests will soon have more reasons to love the MGM Grand. The famous property at the south end of the Las Vegas Strip has been in the middle of a $300 million renovation project to its main tower, and the first upgraded rooms are open to the public. The project will eventually redo more than 4,000 rooms. Another part of the remodel is the addition of 110 new suites, made possible by the transforming of about 350 standard rooms on the top floors, offering guests more spacious accommodations. Construction on those units began late last year and is expected to…