I don't find it that useful or intuitive. It does keep me up to date on the weather where I am, but I can look out a window or use any of a bunch of widgets for real time/location weather. The destination service is always telling me how far work or home is away (regardless of my calendar) depending which one I am further from. The stocks doesn't seem to follow what I'm interested in too closely despite using Google Finance on the desktop. I do like when it has brought up flight details but this is not consistent enough to rely on. Currently it seems best for suggesting articles to read as it knows if I've been googling a topic or product.

Overall I'll keep adding my information manually and allowing passive collection. I have seen it improve quite a bit from it's earliest iteration . Getting Now working well will take some time. It has great potential utility if they nail it.