I like that it's easy enough anyone can use this online platform with just some training from their tutors or mentors over Skype/Facetime etc - they have great tutorials too! It could be easier using more modern features but as long you know your way around Google Docs then everything should work ok (if not perfectly).
This software helps me run different courses at once so there isn't much downtime when people get stuck during lessons which makes life less stressful overall if things go wrong mid lesson such us no internet connection ect.. We also make sure our students feel welcome every time by asking them how we're doing before each session starts via Whatsapp messages & Instagram comments / DMs throughout all sessions.