I really like how they kept up with me through out my pregnancy, including ultrasounds! They were so friendly to us during our second trimester when we had an ultrasound done for each baby's heartbeat at different times throughout that month (we found two heartbeats!).
If you're looking into having your first child or if it is just something fun as well - go ahead and do it!! It was definitely worth doing because not only did i find out about both babies' hearts beating within minutes but also got some great pictures from those appointments too.