It's a good support for the search.
But ha same problem with localization.
For Example in Italian the InBox is called "In Arrivo" and if you refine the search by Folder , the sofftware set the filter as in:"In arrivo" (tha is wrong) instead of in:"InBox".
The problem is only for the Folder that must be filtered in the original name and not in localized language.
I hope for a quickly solution of this bug.
For the English localization is perfect.