I'd have to say I was paranoid with my first. I just couldn't sleep and the AngelCare Deluxe was a God send for me!! I know a lot of other moms complained about false alarms, but I just followed the instructions and haven't had any problems. However, I should note I wouldn't necessarily use it on a newborn. At that age its pretty common to have normal periods in their sleep where there is cessation of breathing, and I can see in those cases there being many false alarms. But in my mind I would rather be called in and find everything okay then not at all!!
The first few times our monitor went off it was because he moved off the sensor pad. At first I was frustrated, but one night it went off and I went to check on him and he was sideways, face fully planted up against the bumper pad, and not breathing..Talk about scary. I just had to place my hand on him and he resumed breathing. It could have just been a normal pause in his breathing but the fact he was crammed in the corner really scared me. The next night bumper pads changed to the breathable type and we just took the "false" alarms with a grain of salt. I found it especially relieving to me after he had his vaccinations or when he was sick.
In fact, I still use it on my 2yr old at night. It gives me a sense of peace knowing when he climbs out of bed!! And I have a cheaper version for my 4 month old, not as good of a monitor, but does its job with sensing movement!! So I guess it depends on how paranoid you are, and if you are prepared for false alarms when he first starts moving around. The trick is to find the perfect sensitivity level. Once you find it, unless they are really stuck up in the corner, or as I found out, have there hands under their tummy, the false alarms were really minimal compared to my peace of mind!!
My girlfriend was also paranoid about SIDS said she wouldn't be able to handle the false alarms and just chose to sleep holding her baby for 9 months straight. Her husband's a Paramedic and told her if a baby's going to succumb to SIDS there's nothing you can do at that point!! And no monitor is going to prevent that. Whether that's true or not I really don't know, and I don't think we can really ever know!!
Sorry for such a long winded answer, but in the end I would maybe borrow or test one out for a few nights to see if it relieves or produces more anxiety!! You can always return it..Note though I wouldn't substitute this for following all the suggested SIDS preventions measures or supervision, but more of another aid. Outside of the movement sensor though the Deluxe has an awesome noise monitor ...its voice activated I absolutely love that feature!!!
Congratulations on your new little one!! They are so much fun!!