oh yes I have the Panasonic too and I love it, use it nearly every day. Haven't worked out my costs yet but as we usually buy 'speciality' bread I would guess it's far cheaper than shop-bought. I love knowing exactly what is going into it, and playing around with the recipes, as I have found I can usually reduce the amounts of salt, sugar and even yeast with little to no ill-effects. Oh and I don't use any milk powder or soya flour due to ds1's intolerances.
As well as using it for normal loaves of bread (which get eaten up very quickly in our house) I have made pitta bread, bagels, raisin bread, hot cross buns, brioche, banana bread and gluten-free bread. Oh, and pizza dough, but as I often have people round when I'm making pizza it's not usually enough. The kids like making it by hand anyway.
Since dp bought me mine, my mum and my sister have bought one too. I didn't realise the other versions weren't much cop though. Thank goodness dp researches his 'gadgets' well.
Mine is the Panasonic SD-253 if that helps you locate one . He also bought me a recipe book called 'Fresh Bread in the Morning' which has loads of great breadmaker recipes, explains what all the ingredients do, and has a trouble-shooting section at the back.