I like the look of these drums- they're handmade and seem to be good quality as far as the shells, and attached hardware.
My concern with these drums is when you tension them, both heads tighten up the same. It seems you could get a good tone out of them, but maybe only one good tone, instead of being able to have the bottom head tighter or looser to change the timbre, and projection.
It is a neat idea, I'd like to try them and see what I could do tuning wise. I wonder how changing heads is with these as well....yikes..haha
Leedy Drums sort of had this type of concept, back in the 50's with the ''Knob Tension Drums''