Pros: Plenty of power, incredibly low noise floor, convenience
Cons: A little expensive
I've written a pretty detailed review of this in its own thread, so I'll just say that I love this amp. The integrated DAC is incredible and leaves me wanting nothing else from it. It has all of the features I could possibly want in a combo unit. Powers my HD650s cleanly to painful volumes with no problem whatsoever. It brings out the best in every single pair of my headphones.
I also use it as a preamp for my monitor speakers. I couldn't be any happier with this purchase.