I don't play that instrument but might play with one some day. The problem is it barely costs more than a melodica to get a shoenhut celeste and that has my eye a bit more. Either way, it is a lower priority than a guitar amp for my uke.
Not to hijack the thread, but anyone with vids to share with a melodica?
I've used mine in multi-tracked videos to fill in for horns on soul stuff. Fun, but it's a little hard to make them very expressive, since you don't have much control over the shape of the sound. Or maybe that's just my lack of skill.