I'm a very keen cook and have a range cooker with two large ovens which I'll continue to use for entertaining. Struck me as very wasteful to turn the oven on for one item, so I looked into Halogen Multi Cookers. I initially bought an Igenix from a local retailer, but after first use I noticed flaws in the base of the glass bowl. A similar story with others in the showroom so I accepted a refund. I then opted for the Andrew James 12litre Deluxe because I'd already established that the extender ring was a great asset and the lid holder essential. There was also more space between the two shelves so one can cook, say, a roast on the top and vegetables underneath with ease on the oven trays provided. The recipe book is also essential as the Operating Instructions are not good, and I have subsquently bought the Maryanne Madden Halogen Oven Cookbook as well. Perfect roast chicken and excellent baked potatoes so far, and I look forward to experimenting with more dishes. Think one does need space to leave the cooker on the work surface rather than put it away after each use - it is quite heavy.