Nicely, thanks! I've been using it for an additional pull at the end of my daily 4-card draw with the DruidCraft, treating it as a "summary" card to replace the quintessence (which hasn't been telling me much). Because it's a fairly large deck dimensionally (only slightly smaller than the DruiidCraft), it works well, the only thing being that many of the cards are dark-toned (and they all have black borders), where the DruidCraft is fairly light. But the Celtic imagery makes it a good companion until I find one that it's more visually compatible with.
To be honest, I need to dig into the card meanings in the book a little more. I couldn't penetrate it past the first couple of pages because of the atrocious editing job.