I've also noticed that whenever I have Story Progression, not only does my game lag a lot, but it has this really strange glitch. For instance, when I send my teens to school, it is so overpopulated outside of the school, that my teens can't go inside and end up being accused of skipping. That also happened when I sent them to prom and various other things. Not sure why it happens and literally ALL of the kids/teens that exist in my town are just standing outside the school. So it has this overpopulation glitch that tends to slow things down too. But I did like some of the stories and how it hooked Sims up and gave them jobs, etc. So now I've decided, when I start getting bored with my usual families, I add story progression for a day(real life) or so just to mix things up and then take it off again. The other mods I have are Overwatch (so useful), Master Controller(love it too), Hybrid(I lenjoy making faerie/witch/genie/mermaids), careers(it's okay) and traveler(really fun). For the most part they are fine, it's just SP that makes things get a little glitchy and strange.