The TBI on the battery does indeed compare well with amps costing several times more. It is one of a very few Class D offerings that I have found to sound musical as opposed to harsh/offensive. The vast majority of Class D amps I have heard do not sound all that good with my speakers.
Remember, synergy is always in play here. It is intended for usage in low wattage situations, where it (generally) sounds excellent. For those folks who wish to get the SET sound without having to worry about dodgy Chinese output tubes, this is a good option for consideration.
Rex and I had the experience to hear the Ncores on tour, but the TBI had more transparency, more holographic imaging, bigger soundstage, and more emotion than the Ncores had in our systems. I never expected 100% of the tour members to agree with me, no amp in the world will ever get 100% approval because of system synergy. Synergy is the key to every system, I agree with Freo-1.
Not sure what the ncore has to do with anything here....