I love this EP, the elixirs are great. I also love how fairies and witches train their powers, and need no items to cast spells only magic power, which is like mana in role playing games. I love Bonehilda, and have so since The Sims Makin' Magic. She scared the human maid then to, I have a place in my heart for Bonehilda hehe. I love that all life states are easily to make, and it was pretty nice that the developers made elixirs to make SimBots and Mummies, since they couldn't make them in CAS. I love the teleporter phone booths, I love the fact that you can have as many on your lot as you want. I think the Alchemy cabinets are really nice, I also think the bookcase door is fun. Secret rooms can be made, I only wish they could be locked. I love this EP, magic has been one of my favorite things in the Sims series. They improved magic in this game so much.
Edit: I love the magic mirror to, I laugh everytime I use it. It's so much like Snow White, without the Evil Queen.