As we have no family living at home these days, no need for a slow cooker, but if needed, a slow simmer on the stove top or the oven as Tulip says suits me. If you decide to buy one Selina make sure you have all the bench space for it and preparations.
Some of the appliances on sale these days are huge, I doubt many households would have the bench space or cupboard space to store these over the top enormous gadgets.
Salina, I live in a single household and I use my slow cooker for joints of meat, e.g. corned silverside and casseroles. It is used more at this time of the year than in summer but I am happy with the result I get from my simple cooking methods 🙂