Earlier quoted context omitted.
Been using jit.si for months with extended family (up to ~7 connections), not broken yet.
Then you are lucky. It breaks frequently (but randomly) and when it does, it's almost impossible to debug unless you have access to the broken machine (and that is unlikely given that you're probably at home and so are they).
If it breaks a lot we must have been exceptionally lucky for none of us to have problems.