Ratings Agency Position ~ CMBS

I’ve been considering applying for an CMBS analyst position at a ratings agency. Anyone have any experience or comments about CMBS / ratings agency work? I’m wondering what the work / life balance is like, and whether there is typically room for advancement, or whether it’s a droll dead end with an endless volume of work… I currently work in real estate (corporate) finance, at a small private firm, so this would be a big jump… any thoughts? thanks guys…