Being able to create filters is a very useful option,
It would be nice if the advanced search used for filter creation allowed you to:
-set up "no" relationships (I.E everything NOT in "Home" Context, i am aware that you can always just mark everything except for "Home", it just takes more time....)
-Set up "or" relationships (I.E, i want everything tagged with "money OR house", along with everything in "Errands" context, regardless of tag)