From their very first shows I've heard that they're terrible live. Except for some people who claim to have seen them on off nights.
I just wrote something about them (http://www.zoom-in.com/blog/music/katie-camosy/clap-your-hands-say-yeahs-final-show), and I'm hearing it again.
I'm seeing them for the first time next week. What should I expect? Is it the singer? The sound in general? Does it not sound like the (first) album?