I'm doing the deep throat saliva tests that the govt is still providing for free. It takes 2-3 days to come back but it's painless, reasonably accurate (albeit not PCR), and free! If I needed to be very accurate and speedy (eg. avoid infecting 100 kids or disabled or elderly folk, or if I am living with someone autoimmune impaired), then I would look for something else.
Last year, a pharmacist said that the govt deep throat saliva test if correctly administered were more accurate than some of the home testing kits they sold, but I'm not sure if they've improved the technology since then.
Having said that you can't use the results to meet mandatory testing nor foreign travel requirements.