I finally purchased this library after Thanksgiving, and following a super intense end-of-year deadline crunch mode at work, got a chance to work with it tonight, on a jazz piece I wrote in a Cumbia-influenced style a number of years ago. Up to now, only Vir2's World Impact library had a tambora set, so it is nice to finally have a deeply sampled dedicated library.
There's a lot to this library, but my needs are simple, and I ultimately ended up using the Default B snapshot and sticking to the blue keys. I always like it when L/R octave-apart key mappings are present for this sort of stuff as it adds to the realism of phrasing.
Unless I am mistaken, there are two basic articulations mapped to C3/C4 and D3/D4, and two Llamador articulations mapped to E3/E4 and F3/F4 (a sort of double strike).
My understanding of Tambora is that there are often three players but two basic instruments, with the Llamador being a role that is assigned to one of the Tambora players and the Alegre (coming soon from Wellencraft) being a slightly different drum (though also similar in many ways). Of course, regional variants exist as well, along with semi-modern construction vs. strictly traditional.
I look forward to the academic literature and sheet music that the user manual says will come along for the ride. I always appreciate vendors who take an in-depth approach to their works vs. an "everything but the kitchen sink" library that is mostly meant for soundtrack composers to evoke a culture or setting. I know that's where the money is, but I appreciate it when a library comes along for those who are truly interested in exploring musical traditions from around the world.