My essentials list always seems a million miles from that of others. You'll find your own `essentials' but can get pretty much anything 24/7 so we didn't buy much & everyone seems to be really generous in buying for babies, especially multiples. Not that I didn't spend hours researching which of everything I might buy should I decide it would be useful (bottles, pump etc).
I agree totally with that article with the exception of nappies (but we were lucky enough to be given enough cloth nappies for our two).
My most useful stuff:
Babygrows. Surprised myself by hating having them in anything other than white sleepsuits til they were a few months old.
Dreampod/sleeping bags
car seats / buggy
slings
Rocker chair that we still use now (23months) & I decided a second would be useful when they were 10wks or so.
Playmat big enough for two (Taffs toys)
travel cot for sleeping downstairs / cotbed for upstairs
Nappy bin (but only for cloth, disposables go straight to outside bin)
CD of children's music to improve my repertoire. Not essential but saved my poor boys from some inane drivel...
Least useful buys:
bibs, muslins, scratch mits/booties, nipple cream, cotton wool/buds, baby toiletries, infacol, outfits, blankets, breastpads, top & tail bowl
Didn't bother with: moses baskets, baby bath, bath seats, baby monitor, steriliser, bottle warmer, feeding pillows, posh pram (friend gave us double buggy), sorting out nursery til they were 6months.