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I’ve played one, and I briefly owned its 6 string brother, the 322. In my opinion they are wonderful instruments. I’m a mid-size person and they played really comfortably for me — noticeably smaller than my Guild dread, which is probably a fair comparison to your D28 in terms of size — and they have a really nice warm, balanced sound.
One thing, though — don’t let anybody tell you “they sound bigger than they are.” That always seems to come up with these guitars, and it just isn’t true. They sound exactly like what they are, so it’s not going to be a boomer like your dreadnought, but it is going to be lush, smooth, and noticeably richer, fuller, and more nuanced than your Mini. It will make good bass, but dig in hard and it will compress like any smaller guitar will.
I hope you get to play one and love it!