I've never even heard of these, but my feeling is that, if you need that many frets, you're just a frustrated mandolin player, anyway, and you need to admit it.

I've tried chromatic dulcimers and I think they're a bad idea. I think the 7 1/2 fret is a good idea because you need it to play most modern tunes and it's unobtrusive. Certain partial frets are fine (I've played for 10 years and never wished I had them, but I know some who use them). Overall, though, my feeling is that if you can't get it by retuning, cross-strumming, or capo-ing, you shouldn't be trying it on the dulcimer