Constructive critique please

[S1dewinder]

I've got a video on youtube from my band's 2nd gig, and I'd like your opinion about the performance as a whole... sorry about the lyrics not being english=)

http://youtube.com/watch?v=gHphWbaTdQA

Thanks in advance for your feedback.

 

[BuffaloBass]

Nice! A few times the vocal harmonies come out of synch, one of the singers isnt holding their notes steady, they are sliding up to or down to them, and that sounds off in a harmony. Otherwise - CZECH ROCKS!

 

[S1dewinder]

Thanks a lot for looking at the vid, I almost gave up hope for some answer=)
I'll try to tell the singer (I think I know what exactly do you mean) but he's a guitard... gotta take a sensitive approach