I typically buy seven or eight AppSumo products a year. I am seldom disappointed, but I cannot claim to use them all, year after year.
Sessions is however a product that I will be using for a long time because it precisely meets my needs.
I run several "brands" in a five-person company. Sessions allows us to receive clients into Meetings and Webinars with appropriate branding (include CNAME URLs), backgrounds and other resources. Our clients immediately see that "we have done this kind of meeting before, we know what you expect, and we can immediately deliver on our promise". Sessions is just great for augmenting our credibility with the client from the first moments.
The platform has been super stable for me, and the video/audio quality have been excellent. Email reminders, calendar/appointments, auto-reminders... everything we need to replace Calendly, Zoom and other similar tools.
I purchased my first Sessions license several months ago, and today I am upgrading to "Tier 5" to access Zapier automations. Looking forward to it!