It's it funny how one persons 'Couldn't live without', is anothers nightmare waste of money!! I can't stand moniters. I used it for a few days with each child, and then figured if they were distressed I would hear them cry!
The bath seat thing, and the foam sponge, both great. Except my 9 month old climbs out of her seat now to play in the big bath with her sister (2 1/2).
Stair gates really irritate me. We use one at the top, and I did have one at the bottom, but I got too pissed off with it! My number 2 can climb the stairs, but can't get down again, so I am trying to teach her. Number one learnt to come downstairs, just days after going up. In fact she kept going backwards downstairs until recently, and will go backwards if it's steep.
Baby wipes, can't live without! No question here.
Sleeping bags, ditto for no 2, my other one was always too small for them (she was premature) and hated them when she was big enough.
I can't live without the Mothercare sterilizer bottles! Fab invention, didn't have them first time aorund, but now a sterilized bottle in just 1 1/2 mins. These and a couple of small cartons of formula have saved my sanity many a time!