DD is aout to turn 6 months and I just bought the arm and hammer one.
TO be honest, now that she is starting solids I don't think ANYTHING will keep that poo stench in!
But for regular pee diapers it is doing fine.
I was using a simple step can, knowing it wasn't a long term solution.
Best thing is to just walk the poop diapers to the outside trash as soon as LO is changed. This isn't so bad once they stop pooping 12 times per day,