Especially the lower octave has a very pleasant warm sound, that is easy to keep in internally consistent tune even for a beginner. The breath pressure on the first two notes is very low though; consistently playing the low A in standard tuning takes very fine breath control. Same with the high DEF, though for the opposite reason: the breath curve tilts up quite a bit after the first octave. It either takes quite a bit of practice, or some advanced appreciation for microtonality.
Overall, this makes my plastic ocarina feel like a toy. It sounds way better than I expected for the price.