South American thrash has a reputation as being wild, aggressive, and furious. Unfortunately, these Brazilians are none of those, so this demo is a bit dry and boring. The production is clean, but the performance has a very stiff studio feeling - it just doesn't have that crazy live feeling that you hope for from a band like this.
The music has the usual crossover influences, and a solid dose of NY/NJ thrash like Nuclear Assault, SOD, and Overkill - you can hear some of those influences from the riffing and short song structures, but the vocalist completely lacks charisma and intensity, which stifles any energy the band might have. Nothing from the drums, either. This whole thing is basically a fairly blank template for the guitar work, which is simple - as white bread as it could be. Five short cuts, little adornment, nothing memorable in songwriting nor in spirit.
Bottom line: If you love thrash you can manage a listen painlessly, and that's the highest compliment this earns.