I like mine. I haven't tried any DSD through it, unfortunately, but the choices of tube/ss stage and upsampling work well to tailor to different music. The tube v. solid state isn't as quite as different as I thought it would be, but it's a noticeable and worthwhile tweak. Using the tube stage with a passive is nice and an improvement over the internal volume control, although I've been told that it shouldn't be because of however Cary implemented it.
While fun, it can be a little bit of a distraction from the music to have the urge to fiddle with it. Oooh, let's try the solid state with this song...um, should try it again with the tubes and upsampled another step.