I find the sidebar annoying, but perhaps more so because we have used google without it for so long. I tend to agree with techcrunch that there is redundancy in the side and top bar. New logo is good, search box is ok...but this modern style of it and the buttons seems out of place and more distracting then anything. The search features on the side are nice...but I used them so rarely in the past and don't see myself…
I use the time-based filtering all the time now. I didn't really expect to when I first started in the beta. It's incredibly helpful when searching on topics that undergo wholesale changes often (e.g. the vast majority of technology). Without using the filtering I get frustrated with Google results with high PR that end up being horribly outdated.
For example, if I want to see a recent Obama speech I missed. Its nearly impossible to find the one you want without time-based filtering.