I don’t have a slow cooker or anything similar but it is something I’ve looked in to in the past.
Came across this article a while back which you may find useful. It’s quite critical of slow cookers arguing you sacrifice flavour and texture for very little, if any, convenience compared to pressure cookers or dutch ovens.
just as a suggestion, get a larger one than you need. You can use those crockpot bags and cook two different meals at the same time. So you can cook both chili and beef stew and have meals for the week without having to eat the same thing every night.