I used mine last year and was extremely happy about it.
Basically, things like X-rays, cleanings, examinations, are 100% covered. Other things like fillings or other repairs are 75% covered. All of details about how much is covered can be found
here.
Another thing is that you have up to a certain dollar amount that is covered. This means that all of the aformentioned procedures are covered until the total amount you spend is $750. So, If I get $755 worth of x-rays, I'm going to have to pay for the extra $5.
The MSU also has what is labelled as '
online dentists.' I had no idea what this meant but when I had called one of these guys on the phone, they seemed to be a lot more helpful when it came to our dental plans than any other random dentist. The reason is because when you go to one of those online dentists, you
don't have to pay upfront, keep your receipt, go and get the dental plan reimbursement form, and then wait to get reimbursed later on. You can just go in, have whatever you need done and that's that! =)