MSUFCU, as it is called, is a great Credit Union open to MSU Students, Staff, and others via business relationships and such. They have locations in Lansing, East Lansing, Okemos, and more. They also have ATM machines in every "QD" (Quality Dairy) in Lansing.
Even though their televisions leave something to be desired, the credit unions are fantastic for a checking, savings, mortgage, or business account. I use them for all of my personal banking and business banking needs, and have run into little or no problems over the years.
Their interest rates are reasonable also.