Although I used the CMS recording monitor, the instructions and the download to the computer was awkward. My sensor/monitor was a cheap Chinese gadget, but the full page printout of my overnight data was worth it. Definitely buy the recording oximeter and wear a few nights, so you can be reassured that you did not have significant hypoxia during deep sleep. One home test showed the desat "only to 82" (be sure and see your raw data as this was told to me as "normal"), but another night of "good" sleep had a desat of 65 within two hours.
Should you snore, grasp or have multiple risk factors, I would encourage having full sleep study, rather than just the oximeter. It was very alarming to see my EEG was not zigging in response to such long apneas, as if something was askew with my brain. However, my complacent brain adapted very easily to the nightly tube. Sleep apnea is very stigmatized, so feel free to PM me if you have questions.
We will have to stay abreast with the NYU study as to AD and sleep apnea---which came first?