The production is rough, as one would expect. However, it is not necessarily in a good way. The guitar sound is thin and has a decent amount of fuzz, but it still lacks any real edge. The drumming is pretty bad, possessing a hollow sound that is actually kind of distracting and gives the whole recording a rather childish sound. Instead of sounding raw and necro, this just sounds bad. Thankfully, by the time they recorded Time of Sabbath, they corrected some of these problems.
The songwriting is rather primitive but, again, not really in a positive sense. In this case, the material is simplistic and not terribly engaging. It fails to really create any sort of dark atmosphere, mostly just plodding along and going through the motions, without doing anything worth noting. The harsh vocals are there, as well as the lo-fi production and Satanic lyrics and imagery. And yet... nothing. This is so far below their second demo that it almost seems like a completely different band.
Devoted to Satan is not the best musical tribute ever dedicated to the lord of Hell. In fact, this is so boring and lackluster, one might imagine that Christians were behind this as a means to secretly defile and insult the Black Metal cult. There is absolutely no feeling behind any of the music on this tape. It is very uninspired and hardly worth the time to bother with, unless you are just really curious.