It's one of my favorite packs, but there has always been so many limitations that have held it back. Even with those limitations it's still in my top 2 or 3 packs.
For Rent looks like it will address quite a few of them. One of my big wants has been the ability to fully modify existing apartments, windows and doors on exterior walls, without mods. I haven't seen anything saying we're getting that with this pack but I'm hoping it will happen. At least with For Rent we should be able to expand the current apartments to have more sims living in each building.