I feel like the more packs you have the more they work together, so being honest it was laggy for a lot of people, some had it so bad they couldn't play some just had a minor irritation. That was a long time ago now more people enjoy it, I use the features like festivals rarely but I play a lot of different families so some will go to them. I have had it a while and couldn't imagine playing the game without it as I never had much lagging and it is enjoyable to build up from an apartment as you take your sim through life, I'd say even if you just decided you're interested it is worth it, but if you're unsure I would click through some old lets plays of it to see how people play with it to see if it would really be a good addition for you.