I used a £50 BT one with ds which worked fine and had a cordless receiver so I could move around the house without having to unplug it and even take it into the garden (unlikely at this time of year). It has given up the ghost though so need to buy a new one for bubs. Hubby's colleague has been gushing about their Baby Angel (or whatever they're called) - the one which gives you heart rate and temperature and all that jazz as well. Not sure what I think of them - too much info which could make you paranoid, or extra peace of mind because you know baby is fine? Any thoughts would be helpful and appreciated! :)