Pros: Very open sound stage. Simple interface.
Cons: Unreliable sound
This thing is beautiful, simple, and well designed. But, I've now found myself unable to rely on it for unadulterated sound. Not too long after I first purchased it, there began a static sound that would dominate the music. I'd tried 3 pairs of tubes... No luck. So, I sent it in, letting them know what happened. But they sent it back, saying it had been fixed, when the same problem still existed.
Now I use my Headroom Micro Amp/DAC combo that I had planned to upgrade from and I'm a happy camper. The sound, while having a bit less of a sizable soundstage, is arguably better.
Once you can't trust a product to behave properly, it's hard to take it seriously. I still have it, but I'd rather spend my time with my old set up -- or my new ESP950s.