I was looking forward to an inexpensive replacement for Warhammer 40K, and BDA looked to fill my needs. I was disappointed.
The purchase gets you some units, and rules on how to have them fight. Missing is any point cost for the units (so you have no idea of how to set up a "fair" fight). There are a few races, but the rules break them into "good" and "evil", so there aren't that many sides to choose. Units aren't customizable to any extent, so there isn't a lot of tweaking to do even if you had a point count. (The rules mention a point count at one point, but none is given for the units).
The combat between units appears decent enough, though I haven't tried it. Being unable to assemble an "army" or have an idea of how units are expected to compare left me with little interest in trying further. I visited the author's webpage and sent an email seeking assistance, but two weeks have gone by without an answer.
I think the basic concept is quite workable, but I'd rule this product in need of some basic editing. I can't imagine what the first edition was like. For anyone seeking a WH40K replacement, look elsewhere, there just isn't the customization here. (That's not itself a criticism, but it's info that is unavailable in the product description)