Howdy Ruinweaver! FM is a good little program I think if you are not wanting to really put an exhaustive amount of 'graphic detail' into your maps. I think, imo, that FM is good for a first sketchy pass and solidifying the basics of what is on your map. I think in terms of FM as good with the content you want to include.

I have Corel Painter, (soon to grab gimp), CC3 and its various mapping extensions, etc... BUT, granted I have all this, but it is really about the MAP and what you put down on it, NOT about the 'TOOLS' that you use to make it.

I was an architect intern for years and used CAD, Photoshop, etc.. for years, but no matter what you use, its not about the TOOLs its about the content.

Imagine of workflow as you start to become familiar with GIMP, FM v8, etc... then find a way to use them all, if you need to. Sometimes creating something is about the path you take to get to the finished work...

Just some thoughts...