Didnt know is it safe or not since the git given seems like not that active.
1. it's git you can see the source, safe or not
2. how we know it still working or not if we not try
3. from the name.. it sandeep... he is one of top contributor and have many good tutorial include tutorial from many years ago about creating disk quota that until today still working
4. lucky you, you got reply from support...