Mine just arrived a couple of hours ago and I am wearing one now as I type.
The readings are much more stable then when using the standard probe, I experience tachycardia during the daytime and when using my BiPAP. I take Beta blockers to help control mt heart.
I have experienced times when the standard sensor would come off my finger at night. I would also find in the reports large numbers of artifacts. When I found these online I decided to give them a try. They somewhat remind me of what I used when in the hospital. Except to move or remove a sensor in there required a whole new sensor to be installed. Several times I had to have new sensors as I would experience irritation after a few days on the same finger.
These, all you need to do is replace the tape. I decided to just take a 5-6" section of electrical tape and it works wonderfully. The supplied tapes (5 per sensor) have 2-square punch outs for alignment on your finfer But medical cloth tape or electrical tape works well also.
If you want accurate sleep oxygen/heart rate data I do recommend these sensors. It did take quite a while for them to arrive from china, but I am certainly glad I have then now.