I second what Taurean said about other brands too! Slumber Sacs are really cute and cheaper than Grobags if I remember right, Also (I'm a little addicted too ) I cruise ebay for bargains got a 0-6months 2.5 TOG for $10 the other week (+$7 potage) but still a bargain!

DD is an explosive pooer so often we need to wash her bag due to collateral damage so we have 3 of the 2.5s (freezing here in winter) DS didn't really have exploding nappies so we really could have gotten by with one or two, but we had 3, probably because I couldn't help myself