Most modern slow cookers cook at a high temperature, the same for both the "Fast" and "Slow" settings, with the heating element cycled on less frequently for "Slow".  The first slow cooker I tried reached a slow simmer on both settings, spewing an constant stream of steam through a vent hole, causing more odor  asthma 
trigger in my household) than cooking a roast in the oven.  I gave it away and bought this Multicooker.  I couldn't be more pleased.  It has *real* temperature control and both the "Simmer" and "Slow" settings hold a temperature below the boiling point - no or little odor!   The ability to brown and saute is very useful as well, providing an extra "stove burner" when one is needed.  I haven't yet used the steam setting but I can see how it would be valuable as well.

The lightweight non-stick pot is also way more convenient than the heavy and breaka ble crockery pots in many slow cookers.