The arm is difficult to adjust. I accidentally extended it all the way out and wasn't able to bring it back in. The big problem with the lamp is the shade though. You assemble the top ring, bottom ring, and wrap the fabric shade piece around the rings, then "velcro" it together. The velcro seam doesn't line up all the way. Plus, the bottom ring has this weird plastic thing with a hole in the middle to let some light in. It's so ugly. So, I cut it out with scissors. But as I was trying to cut as close as possible to the edge, the fabric from the shade was also cut. So now it has a really jagged, unfinished edge around the bottom ring, the part of the shade that is most visible. The only redeeming quality is the marble base. It is very sturdy and pretty.