WingZ

I've been looking for a database package for a Unix system, and am considering Informix-SE among others. Originally I wasn't considering WingZ as a front end because I was told that it was somewhat limited as to what kind of queries it could process. For us, the main point of using a relational database is to process complex SELECT statements--the description of WingZ as a "spreadsheet" doesn't make it sound relevant to us. On the other hand, I think we'd be better off with a completely X-windows based GUI interface, rather than a character-based interface. Hence, could anyone comment on the ease-of-use of WingZ, and its flexibility in regard to SQL queries, compared to Informix-4GL? Thank you in advance, Bill Thompson