This is brand new (I think) from Joyo, and very hard to get here thus far. It's on order, and I'll likely will have to wait a few weeks, but I believe it'll be worth it. Seven drum kits with seven drum styles [ie. Blues, rock, jazz ect.] With fills, intro/outro and such. And a 40 min Looper with unlimited layers. Said to be interactive between the systems and tap tempo settings by the user.
The demos on YouTube caught my attention, and the drums sound great, and the layering of tracks that automatically align sold me.
Now to wait for it's arrival, and then see if I'm going to be smart enough to use it. After all, there's a computer chip or two in there!