I have had the large 6 litre Crockpot, black with a chrome base, about £40, and a 3 litre slow cooker from Sainsbury's, white, cost £20. I prefer the smaller one, which still allows room for a casserole for 5 or 6 people, and is so much easier to clean. The Crockpot was heavy and I ended up chipping it in my ceramic sink. The chome base stained with cooking juices that dripped when I stirred it on coming home, and by the time I turned the thing off and tried to clean it, it had permanent drip marks that wouldn't come off, despite trying everything I could think of. So don't choose a chrome base. They all do the same job, but some have more sophisticated timers. I would say get the one you like the look of.