I don't know all that much about this band, except that they were another good mid-90s screamo/hardcore band. And what more could you want?
Fourfa has Guyver-1 at the end of his list of the best 'hardcore emo' records for their s/t 7", which he describes with extreme concision as:
"a little late in the game, but still fantastically good hardcore"
The rest of that list, by the way, is made up of such other fantastic hardcore records as Heroin, Swing Kids, Reach Out and Mohinder. So whatever you may think of Andy Radin's arbitrary classifications, and interpretation of scene history (personally, I think it's a great resource and very excellently written), you should get a good idea of what the band sounds like.
It's typically abrasive-yet-melodic hardcore emo, yet with a certain twist. Here's blend's description of that 7" from Zen and the Art of Face Punching:
"Super frantic early screamo from none other than San Diego. Very similar to Swing Kids, Antioch Arrow, Clikatat Ikatowi and Heroin (theres gotta be something in the water there). The funny thing about this record is the Grandmaster Flash and Sugar Hill Gang records playing in the background of the recording... Very similar to the Indian Summer song Angry Son, with the Bessie Smith record playing... Funny, and then the band cuts your entrails out with a swift razor sharp blast and youre not laughing anymore.... until the next break when you can hear more old school hip-hop. Yay."
Download: Guyver-One - 7"
Now, while the 7" is an awesome record - "balls to the walls" to use blend's words again - Guyver-1 did also have a full-length record, entitled Obsessed With.... It's nowhere near as good as the 7", but I really don't think it's all that bad, and in fact it's quite good.
I can't say all that much about it now because - ironically - the burned CD copy I have won't play in my stereo at the moment, but trust me that it's worth a listen. I guess I intended writing a sizeable apologia for the album, yet for now I can't offer much more than a vague description
Obsessed With... lacks a lot of the focus and energy of the s/t 7", but that's not to say that it doesn't have its moments of viscera and punch. At times - and indeed, often - the abrasiveness gives way to a lot of quiet, instrumental passages, including, in one case I think, a piano. I rememeber listening to this a while ago and thinking that Obsessed With... represented accordingly the valuable progressive trend in hardcore - that is, the willingness to bring in different artistic styles to aid the expression of what, in essence, is a very singular, intense sound.
Unfortunately this occurs at the expense of Guyver-1's characteristic, and musically impressive, intensity. Maybe this particular of hardcore is best listened to only on 7"s - there are other albums which wander a little bit too, like Merel's s/t, or Clikatat Ikatowi's Orchestrated and Conducted.... The Swing Kids disco provides a kind of half-exception to that rule, as it works as an excellent, cohesive (albeit very short) album, but it is actually only a collection of 7"s and parts of 7"s. Equally, the lengthy Mohinder discography delivers the Guyver-esque abrasiveness in a long sequence of bursts. You can judge for yourself whether Guyver's attempt to translate abrasive and intensive mid 90s hardcore into a real album works or falls flat...
Download: Guyver-One - Obsessed With...
Edit: go here for scans of all the artwork from the 7"