Bought the "Billy" bookshelf in dark brown about a year ago, and it's been slowly falling apart since then. The back panel separated, and the shelf started leaning sideways a few months ago. Lower shelf finally gave out: the rivets that held up the shelf had snapped clean off. I have heavy books, but I rarely move them around and it's a low traffic unit. I knew buying the shelf that it wouldn't last forever, in fact I knew I probably wouldn't be able to move it after it was put together and installed. The materials are cheap, and when you construct the shelf it's obvious that you won't be taking it apart (unless it's to the dump). I'm disappointed, however, that it felt apart so quickly--it was a good size for the space. I'm writing a review here because the IKEA website doesn't seem to accept reviews unless you bought the item under your account--and I can't help but be suspicious of the numerous positive reviews regarding this product.