Owlet monitor

Has anyone used this monitor or something similar? I have a coworker who just lost her 3 month old to SIDS and want to do anything I can to prevent that. But there are so many options. Is anyone else planning on getting something like this?

https://store.owletcare.com/collections/owlet/products/owlet-vitals-monitor

Or this?

https://www.amazon.com/gp/aw/d/B00GU07FLQ/ref=mp_s_a_1_4_a_it?ie=UTF8&qid=1490037831&sr=8-4&keywords=owlet+baby+monitor

There are others these two are just the ones I've heard about