Lots of mnetters seem to have them on here and I'm intrigued. I love the idea of an easy ready to go dinner in the evening.
Which ones are best, what do I need to look for in a slow cooker, what can I cook in it, and are there any downsides?
Go! 
This thread is quite old now, so some of the suggestions are out of date, but we’ve very recently refreshed our best slow cooker guide with the models Mumsnetters have tried, tested and loved, including tips on choosing the right one for your kitchen. We hope you find it helpful.
MNHQ 