I've just implemented DxO for my workflow together with Aperture. Basic reason is lens and camera body corrections. I'm not doing a lot PP, only occasionally tweaking WB, sharpness, exposure etc.
I converted all my Aperture libraries to referenced ones. (I know I lost some adjustments, but in my case I could justify that.) Now I can use whatever RAW developer I like, I compared Lightroom and DxO and the latter one suited me better. I can even use all these three, if there would be need for that.
After doing whatever in DxO, I export high quality JPEGs (95% quality to save some disk space) and catalog and share the images, for what Aperture is really great (and you can easily combine video with you images).
For my eye, far from perfect, maybe even good, the end result is now satisfying. And the noise reduction done for high ISO images in DxO is impressive.