It's a long time ago that I have worked with it. Back in the first half of the 90ies of last century when working at NI in Switzerland, we had the entire lead tracking, inventory and invoicing in Filemaker, based on a system developed internally by some NI fanats :-). And no, corporate did not use that system, it was clearly only for the smaller oversea branches!
I was regularly making modifications and extensions to it to add new features and ways to track things.
At that time Filemaker was truely special as you did not really write a database system in it but instead designed (drawed) it, so it was much more similar to LabVIEW than any other database at that time. Is it easier to use than a database you already have experience with? No certainly not!
But it was quite simple to do database systems with it, even relations between tables were possible although it wasn't exactly a full featured relational database back then. I'm not sure I would recognize the current version of Filemaker in any way though as I assume it has come a long way since, just as LabVIEW which has changed from version 3.0 at that time to version 9.0 now.