No, I use the HI Bebe BT-200. I received it as a Christmas present, and was able to find the heartbeat the first time I used it (at 13 weeks). I think it's fantastic.
I didnt get mine from babybeat, I got it off of ebay, however Ive been able to hear the HB since around 10.5 weeks. My OB confirmed at my last appt 11.3 weeks that it was the same sound I was hearing on my own. GL finding it and be patient.
Re: Anyone use a doppler from babybeat.com?
i would wait until at least 12w.
we had one for my last pg and used it from 12w until the end.
we just got ours last week for this pg - which is harder b/c it's twins- but we did find A hb... not sure if it was both babies or the same baby twice