I bought a Little Martin about three years ago. Like your guitar,
@pompeyjazz, it's so easy to carry around I've ended up using it as the starting point for about half the songs I've written since then.
Being quieter than most guitars, due to smaller body, it's really easy to sing over and concentrate on melody ideas, without having to vocally compete with anything louder. So I reckon it's been a big songwriting plus. Cheers!