

i used this on many phones from different brands. It may break some apps (that can be replaced with foss alternatives) but it never bricked any phone. 🤷
there are communities on xdaforums.com or xda-developers.com for specific models where you can find more detailed information



yes, it reboots without play services. You may need to execute the code again after an update (when not only disabled bloat is reinstalled but often new bloatware too is pushed without your consent)
the other comment above mine covers your other questions