It looks like Xobni is following Google in many ways. The recent Gmail-like invitation is an obvious example.
So currently, Xobni doesn’t let you control what PST or folders will be indexed, and what times index should not work as you want your Outlook to be more responsive, etc.
It also doesn’t show you the current index status, so you don’t know if it finished going over all your mail, and I’m still not fully convinced about it’s search capabilities, and when I want to find something in my e-mail for sure, I still turn to X1. X1 also enables me to have advanced search such as all the e-mails sent by me which have “Xobni” in their subject. This can many times come handy, where just searching for “Xobni” isn’t good enough, as it brings too many results.
Xobni can really use an Advanced Search option