It does sound very nice, probably the best unmodified t-amp out there. The little 10uF electrolytic caps on the inputs do seem to tame the highs and make the amp less fatiguing, but at 10uf, the turn-on thump will wake you up when using efficient speakers. It does have the Tripath signature, so you should be pleased if t-amps interest you.
I found that the SMPS sounds identical to using a battery with capacitance when playing through Horn Shoppe speakers.
The bare board is somewhat pre-wired and easy to implement, and SMPS are cheap on ebay. I'd opt for a little bench time and save money, but I like that sort of thing.