I've got a Breville one, I brought it back from my MIL's flat when we cleared it three years ago. I only just got round to using it a few weeks ago. I have used some of the recipes on Katy Kicker's blog and find that it saves us time when the boys have football and just when I want to feel ahead of myself. Dont use it every day, but probably about two or thee times a week.
Oh I absolutely love our slow cooker. Can get away with cheap cuts of meat as the slow cooker dissolves and fat and makes the meat lovely and tender.
A favourite of ours is a gammon joint with either Coke or pineapple juice, whole chicken (held up on 4 balls of kitchen foil) and beef. Beef is absolutely amazing in the sc. Worth doing just for the gravy! The smell takes me back to childhood
I used mine for lamb curry and vegetarian lasagne and both were nice. The lamb was so soft and melted in the mouth. I found a recipe to make your own yogurt which sounds fascinating... might give it a go for fun (we get through boat loads of yogurt in our house).
I've not used my slow cooker yet. But so far it's made me £15 as the lady I got it from in feeegle chucked in a load of other stuff which I've started to sell on. Including a rather fetching pink suitcase which earned me the store mentioned £15. So I think slow cookers are the greatest thing ever!