Severance offer, what should I ask for? after 16 years as a recruiter

I was offered 16 weeks of severance after 16 years as a recruiter, and I have a few days to sign. I would rather hear the honest version than the polite one. I do not want to leave money on the table. What did you ask for?

An hour with an employment lawyer cost me a small fee and made me feel much safer about signing.

I asked for two more weeks and a neutral reference. They agreed to the reference and added a week.