I'm an experienced FileMaker Pro user. I've created a number of databases for my own personal use, including an invoice system, but the most challenging system I built was a cross-platform (Mac and PC) networked FileMaker Pro membership system developed for the Massey University Recreation Centre.
The database system dealt with 5000+ members and included membership invoice, reminder, email, newsletter and label printing as well as monthly statistics reporting systems so the number of new memberships could be assessed.