After playing with this a bit, I can't help but feel that it should also suggest database fields when typing in a search.
For instance, if I want to do a search of [Filename (path)]="\Import\", if I start typing "[Fi" it would be nice to be presented with "[Filename]", "[Filename (name)]", and "[Filename (path)]" as suggestions, to help me remember the syntax of that field.
Although I could just be saying that because, at present, it kind of gets in the way a little bit when trying to do that exact search. The only options it gives me are to pick a filename that contains "\Import\" when what I really want is everything in the Import folder.
Also... when clicking on the "Show all ## results", the suggestions box stays the same size as it was, rather than expand to accommodate the larger list.