Sound — 10
This is the album that began the genre we know as thrash metal. What seperates this genre is the extremely fast guitar riffs that are almost percussive due to the very frequent palm muting and walloping or hitting very hard of the strings. It's also characterized by the extremely fast guitar solos with plenty of hammer ons/pull offs. The vocals in the sound are like in other forms of metal very rough and aggressive but unlike in many other forms of metal what they are saying is discernible. There's also very fast drumming with heavy use of the bass drums. The bass is usually not very audible. This is a very guitar and drum driven genre. Just listen to AFJA you can't even hear the bass.
Lyrics — 7
The lyrics aren't the pinnacle of brilliance but they are definetly above average considering the other stuff that was out at the time. At the peack of glam metal talking about "making love" and "being with my baby" these guys come in with messy hair ripped up jeans and t shirts singing about moshing, going crazy, and getting into fights. Not brilliant but for the time decent.
Overall Impression — 9
A very good album. One of the strongest debut albums for any band. Many of Metallica's most popular songs are from this album like Seek And Destroy and Hit The Lights.