Treble Heart Books is my current publisher, so I'd like to clarify a few things.
Yes, you are mostly on your own for marketing. Lee Emory, the owner/publisher, is right up-front with her authors about that. When she first bought MountainView Publishing (the inspirational division, which has my books) she ran some ads and distributed promo items, but has not done that lately. If you arrange a book signing or event, Lee will make sure your books arrive on time.
She won't give Amazon or B&N the huge discount they demand so she does not list with them. I personally have submitted my books to these sites and though they are shown as "special order," readers can find my books there.
The last time I checked the P&E writer's site, THB had a very good recommendation. I will have to look at that again.
All of my books with THB have gone through thorough editing and proofing, and then I get to review the galleys before printing. Mistakes do happen, but no more so than with NY pubs.
THB is in NO way a vanity publisher. I was formerly a reader for them and rejected many manuscripts. Authors do not have to buy any of their books, pay any fees, and do not supply their family and friends names to receive advertising materials. I would recommend this publisher to anyone.
However, they are a "small press" and in recommending them, I'd also warn the writer about needing to do their own marketing. And on the down side, I will admit to delays within the past year due to personal circumstances of the owner, which have now (hopefully) improved.
If anyone has questions about THB, feel free to PM or e-mail me.