Well sound quality is really bad thats obvious from start. I like some nirvana but cant recall this one im not biggest fan though i play a few on guitar also..Or did back in day..so long ago lol...teen spirit etc..Well back to your song...As a band, I mean it sounds like a pub band playing a decent pub gig lol..singer is nice and aggresive sounding, voice ok for the genre i guess..not really my cup of tea though...overall quality makes it hard to give proper review but drums, guitar, bass etc all seem on point...

Not bad! I'm not particularly familiar with the grunge genre, but it seemed like the instruments were played well in this cover. I can hear that the singer is able to reach the correct pitches as the song goes along, and the drumming seems consistent without missing beats.

However I figure I should mention the recording quality.
While I have no idea what your setup and technology is, it seems to be muffling/garbling your cover. So while the song was played rather well to my knowledge, the result is that it seems like the microphone was in a different room. It can be hard to perfectly understand what is being sung by the singer at times, and the drums sound distorted.

You seem talented, but unfortunately as a result of your recording equipment the cover doesn't sound as well as it probably did as it was played live.

If you had played this song inside a well-equipped recording studio, everything would sound the way it should and this would be a successful cover. So in the future if you get your hands on newer/better audio technology, or figure out how to make your recordings clearer with your current setup and play this again; I'm sure that version will be much better.

Keep up the good work! :P

Vocals and everything sounds like it could be good, shame about the quality though.