I use them here and there, but not generally. cas.fulleditmode is on constantly in my game, but I don't generally use it to its full extent - it's on mostly for those "that looked better in CAS" moments. Otherwise, it's just CAS. I never edit Sim Kids! I do occasionally use the UI mod to move a need up or down. Moveobjects for those things that just won't go where you want them to for no obvious reason. Freerealestate to get them in the house I want them to live in for generations - but they have to furnish it themselves. Reset sim when things look a little wonky or someone is doing something I don't like (NPC).
Mostly, my sims do everything themselves. Cause I'm an evil taskmaster.