Not the best album I've ever heard, but give "Days Are Gone" a few listens, and then it just clicks. There are, of course, songs that stand out and are much better than the rest ("Falling", "If I Could Change Your Mind" and "Days Are Gone" are the shining stars of the album, and, having bought the limited edition with 8 extra tracks/remixes, I would say don't bother, unless you are a hard-core fan). The album is bright and breezy pop sound (with a hint of rock), polished and chillaxing.
The sister-act rock band Haim are from the sunny LA, and you can almost feel the sunshine seeping through the album. The songs are sparkling, danceable and infectious, and this is a classic Haim sound. Yes, it is their first studio album, but Haim have been cultivating their sound for over fifteen years, and [some think] they are much better live than recorded. There are debates around the fact that Este, Danielle and Alana Haim let the producers rub the edges off their talent, and I agree. If you saw them on Jools Holland (or any other life performance) you can tell some of the momentous live energy has been lost in production of "Days Are Gone". But it does not make the album any less enjoyable and easy-listening.