a feature that would intelligently add quotes to a filter.  so a user enters: >=D4 and Jet would change that to ">="&D4.  I train new users and it is daunting for them to intend the first example and have to type the second.  For the rest of us it would just be a welcome change from excessive typing.  Of course the user would have to understand that Jet may not always get it right.  but in most cases it could.