So far I've found several things that prevent me from using Ulysses with the system I've developed for getting print-quality PDFs out of my Markdown:
Going into this review, I actually thought that list would be longer. Still, those two are enough that I'd have to either abandon Ulysses or scrap my system.
These are actually a concern for future-proofing as well. Should I invest time in using Ulysses and later decide to switch away from it, I would only be able to export my sheets as one long combined file per group. If my post-Ulysses world requires individual files then I would have a lot more work to do.