I've used a bath tub and love my diaper genie also! The bottle warmer is too much of a hassle. When the baby wants it, they don't wanna wait a minute to get it. Doesn't seem like much, but it's a long minute with a screaming baby lol I also didn't bother with a changing table or pad. If I was in the basement, then I just change him there. He's been changed on the floor, couch, my lap, etc. haha
Hmm. I think it really depends on your personal preference.. Ive used the bath tub from the start and LOVE the diaper genie.. omg those diapers stink so bad. I never used the bottle sterilizer or the baby K'tan carrier thing.
I actually tried to keep pretty minimal, but never used the baby bath, and the swaddling bags with the Velcro on them... also never used the baby swing, she did not like it... we were very adamant about not getting useless stuff! Never got a crib until she was close to a year old!