As a US worker, I greatly prefer pooled vacation days. The companies that I have worked for that don't have this have _at most_ 15 days of paid vacation (usually either 10 or 12 until I had a few years of work there and had it increased). They had separate sick time, but only ~5 days of it.

The pooled vacations one have 16-20 with sick bundled in. It's about the same if you are sick for more than 5 days (you'd lose either way). If you are sick for less than 5 days, pooled is clearly better.