I bought this melodica internet Suzuki and use it for a few days.
I have several melodicas (mélodions) whose Hammond HP44.
The B-24 is the only bass melodica market unamplified.
+: Good quality, easy on the hand, easy keyboard, amazing stamp but must work his column of air that it sounds really good (I did the sax, singing etc). Then the patch can approach an instrument of the woodwind family! Good exhaust system saliva.
- With only two octaves (half an octave higher is preferred).
Many of inertia on the lowest octave (because I guess thicker blades).