I've got a cheapy one, Bebe sounds, and I wouldn't waste my money. It is very very hard to find the baby's heartbeat, even for me now approaching 22 weeks. Would you stress out if you couldn't find it? Also, I noticed that even my doctor has trouble finding it sometimes even with his fancy doppler. While it is lovely and comforting to hear bubs heartbeat, if i could do it again I wouldnt spend the money.