Is Appointments+ The Right Avenue to Take?

I've been advised to use Appointments plus, but I've also been advised to use Events+ instead.

Can you please address the last couple comments on this post here about whether or not Appointments+ is the right route for my needs??
https://premium.wpmudev.org/forums/topic/pay-per-view-on-an-event-rsvp?replies=30#post-408895