This is an excellent buy; very worth the money. I've seen prices smaller than this at double the price, so was very pleased to pick up a lamp this size for just under £12.
I have this on a tall dresser, and it gives off such a beautiful dim light (this isn't the kind of lamp you can read by, it's an ambience enducer). The lamp comes in about four parts, that being the base, the bulb, the bottle, and the tip. All this takes about 1 minute to put together (no exaggeration), and then you're ready to plug in (plug is already included). If your bottle is already at room temperature, then it will start to move almost immediately. Many lamps promise a "glitter" effect but rarely ever have the glitter moving about inside (usually it just sits about stationary), this one has small foil glitter flakes inside that swirl around when the lamp gets gradually heated up, giving the wall a marbling almost flame like effect (and the ceiling too, I will add).
Will note though, this says it's purple, but it actually is a combination of a light bubble gum pink (at the bottom where the bulb is) rising up into a very deep fuschia colour. All and all, don't let that put you off, the colour is stunning, the effect is lovely (from far away it looks almost like this is a bottle of deep pink oil and you're watching glimmering bubbles rising through it).
Very worth the money, for best effects use in a very dark room with the blinds closed and keep it near a wall or corner so you can enjoy the patterns it'll throw off.