Insurance wouldn't refer me for another sleep study after previous family doctor set BiPAP settings too high. With help of new doctor I've been able to titrate my settings so I'm getting better sleep and my AHI is dropping. I initially tried a different CONTEC monitor but that keep falling off my finger at night and I had trouble pulling data to review. I ordered this and it's been a high difference. The watch is a little bulky, but the fingertip monitor hasn't fallen off once. I'm also able to pull the data first attempt everytime now. This watch also has a built in clock and multiple sessions so it's much easier to sync with the data from my BiPAP machine.