I know TagMango from almost 1 year. But could not buy it due to expensive monthly/annual price point.
Once I see them here on LTD, I grabbed 2 accounts for my 2 different brands. Tier-4 limits are pretty clear from answers given by Abhinav and Team.

Understood all limits well. Still I feel Tier-4 is worth.

I as ahead pushing them to relax on their limits for Tier-4, but they did not considered it. I am ok with it as their business decision. Abhinav clearly mentioned that, upgrade price will be $189 per month, which is not possible for me.

I am setting up my courses, community. TagMango is quite trustworthy company as I am observing their MRR from last one year.

Loving Tier-4 due to no limit on number of students, Chat Rooms, Messaging, Notifications, White labelled android and iOS app, Zoom Subscription (1 year), Smooth selling transactions etc features.

No manual enrollment, No free courses, No possibility of configuring your own payment gateway make me big disappointed, hence reducing a taco. :-)

Support wise, I am getting help in couple of days on my emails. Smrithi and team doing good job. I understand about bit more turn around time, as they must be getting so many support tickets. As I dont have anything burning and urgent really, so I am ok with getting response in couple of days.

So far, I found TagMango quite stable and performing well on my use case. I decided to get adjust with limitations of Tier-4 and keep using all given features.

All the best team !