To my knowledge;
Some people report 100% working. This should mean all apps on PC operate correctly; all internet enabled devices can connect flawlessly.
Other people (myself included) report limited success; the constant being varying levels of actual success.
What I've discovered:
If the first machine you connect runs Tor and shares, all devices connect to Tor machine, tethering is 100%.
If you share only to mobile devices, 99% of the time it works flawlessly with no need for Tor.
Varying levels of success have been reported across devices, but a look at the vastness of successes leads me to believe Tor would circumvent the variables that cause it to fail.
Certain websites and apps apparently utilize a blend of mobile vs. desktop technologies, and thus work without needing Tor. (Google and Facebook are unfiltered domains)
FYI Tor is a free open source anonymising proxy server. You can get it on Android, PC, Mac, Linux, etc.
Data is not all equal. Desktop data looks different than mobile data. Obfuscated data is carrier-permitted. Desktop data is not. Hence, the need for Tor, to obfuscate the data so the carrier cannot tell it is Desktop data.
Hope to have summarised well enough for you.