The MGM Grand is a great place. It is very well appointed and the staff are all very accommodating. The only heads-up would be for older people with walking problems.
The MGM is off to one side of the Foxwoods complex that includes several hotels, many restaurants, and numerous shops. If you are a senior, or have ambulatory issues, it is a very good walk and not one that you may want to do several times a day.
But, the hotel is great, and may be worth the walk. One other side note, there is no pool at the hotel. They have a spa, but it is not complementary for hotel guests.