I have heard from people who were disappointed because they bought "too much kalimba" for themselves - meaning they got more notes than they were prepared to deal with (often, 15 or 17 notes turns out to be too many notes for a beginner). For these people, I recommend they start with a 10-note instrument, as this will be easier to get your head around than the larger kalimbas.
Similarly, when people tell me they are disappointed that their "African" kalimba doesn't play African music, I point them in the direction of the karimba (yes, with an "R" in the middle, and no, I don't make these names up myself). And when they find that 15 or 17 notes is too many for them to deal with, I suggest they look into the Student Karimba.
This is a great instrument for children, for adults who may be overwhelmed by bigger kalimbas, and for people who just want a taste of Africa without having to work too hard. (Note: I LOVE to play these instruments myself, and I do perform songs on the Student Karimba. It is a small instrument, but it is also a real instrument.)