I absolutely loved A Stitch in Time, but his short story "The Calling" in Prophecy and Change was pretty poor, so I'm kind of unsure if it is a good or a bad thing that he didn't write more.
I very much enjoyed it; I'm re-reading the Iliana trilogy at the moment, and both Stitch and Fearful Symmetry do an excellent job of fleshing out Cardassian society, albeit with a focus on the Obsidian Order. I'm going to get around to reading The Never Ending Sacrifice soon, to continue my Cardassian education...
I believe this has been answered elsewhere but I can't find the post: Is A Stitch In Time considered part of the "relaunch" continuity? Yes, I understand the word continuity includes many definitions but is it referenced or considered by current authors?
In Avatar, Bashir's shown to be reading it. I think it was Nog who came up to Bashir asked asked what he was reading, when he replies it's a letter, Nog seemed flabbergasted he was on page 100something of a letter, then he said it was from Garak.
Its a fine, fine book. Even if I didn't care for some of Garek's backstory, it does not excludes that this was one of the best DS9 book before relunch.