I've used a lot of Katy's and FeeEssen's stuff. I've never really had a problem with bugs so much, but often the items look very odd in-game. It's often very "cartoonish" if you'll forgive me for using that word to describe a cartoon game.

FeeEssen has some very cute toddler toys, that give the same skills the maxis toys give-- a ball pen, a drawing table, etc. but she didn't change the animations from the originals. It looks very odd for the toddler to be trying to force a block through a big, plastic ball in a ball bin.