I bought this doppler at 18 weeks pregnant with my 3rd child, as I have an anterior placenta and not feeling her movements was driving me a bit mad. The first few uses took me a while to find her heart beat, but by 20 weeks, I could find it very easily. For the price and quality, I love it which is why I gave it 4 stars.
However, my problem is the product I received is not the same as what is advertised. It looks exactly alike, but did not come with the c.d.s pictured. It does come with an input/output cable for recording purposes, but I unfortunately have not found any device the cord will fit.