Without Server, its difficult to make work. Without FileMaker Pro at the other end, and well written apps, it is useless.
With the two items above, it is fantastic! I use it on an iPad most every day to access information on the companys FM Server - on the go, from anywhere in the plant! Its hard to explain how useful it is until youve used it for a while, then dont have access to it!
Issues? Yeah, a few, but its translating from a desktop environment to a mobile, pad or phone environment.
In short, with the two prerequisites above, it is hard to live without!
Rosenfritz about FileMaker Go 13