There was a very small severance package, and I had some vested RSUs which, somehow, actually had some value (they didn't accelerate my unvested RSUs, which I thought was kind of lousy of them). I did collect unemployment for about a month before I landed the job I have now.
All in all, it wasn't a bad experience, even job-hunting leading into Christmas time. It was the first time I'd ever been unemployed and the first time I'd had 100% of my time to dedicate to searching for a job rather than having to figure out how to schedule interviews around my existing employment. OTOH, I had a pretty in-demand skillset, so it didn't take long to find something. I think it would have gotten really uncomfortable if I'd still been out of work six months later.