Be aware that chulent in slow cooker is different from chulent in pot.
An advantage to slow cooker is that you do not have to leave the hot plate or blech on all shabbos to have hot food for lunch-it’s safer and cooler. You can warm things on top of the slow cooker, or set a timer for the hot plate to just go on before the meals.
(note, you may want to consult your LOR about using times on shabbos and on how to set up a blech for the slow cooker, and how to take food out from it on shabbos).
Once you have it for shabbos, a slow cooker is nice during the week too- set up food in the morning, hot meal waiting for you when you get home from work.