Point taken, Jam, but how many of us are going to go to the trouble of sending a ~ $200 amp back to China for repair when, for example, the USB connection to the DAC ceases to power the thing ?
We have a local reseller for Meier Audio here in Oz who I know will take any feedback re defects very seriously, and Jan has been very quick to respond to any issues raises by Head-Fiers - I may be wrong, but I dont believe that iBasso has a spokesperson like Justin/Jason/Ray or Jan - these guys give their brand a human dimension, presumably at considerable cost to their businesses.
Please note that I am not deprecating the technical accomplishments of iBasso Audio, and I think its great that they are able to produce the P4 for the retail price on their site. As I said earlier, it would be fantastic to be able to compare the P4 and the StepDance, but reality dictates that most of us will make a choice between one or the other - I would hope that part of that choice will be based on the assumption that the amp will stand up to the rigors of portable audio - in my experience with the D4, that simply hasnt been the case, and I dont believe that I am Robinson Crusoe. By contrast, there are legions of Move/HeadSix owners out there who seem to have had their amps in and out of backpacks etc for several years now without incident - as always, there will be exceptions, but that is the impression I get from this and other forums.