Our Doppler came in the mail yesterday! & let me just say.. I'm obsessed! I know all the pros & cons about them, but for my little family we decided it would work.. I definitely recommend the Sonoline B Doppler if you're wanting to purchase/rent one. It only took about 5 minutes of going slow & being patient & BOOM--my little man's heartbeat! He's a squirmy one though, so he moved away from it a lot haha took a lot more time & patience to get a steady reading. I'm just so happy! ☺️💕👏🏼💙