The F-30R is a great couch guitar, although it is loud enough to be used in any coffee house or concert setting. I have one, as well as a larger, bulkier '70 F-212, which is a large jumbo bodied 12-string. That is not a couch guitar! As much as I love the sound of it, just doesn't fit in my lap on the couch, so the f-30R sits just nicely, thank you.
The Guild F-30 is like a Martin 000-28; almost identical in size. Likewise, the Guild D-40 is like a Martin D-18. The Guild D-50 is like the Martin D-28. And so on, and so on . . .
Hmmmm . . . you did ask about the F-30, didn't you. Well, there you have it; in a nutshell.
dennis M