I have been using Amelia for clients since the 2020 Appsumo LTD. Our clients use it for lead generation bookings such as free consultations, free workout sessions, etc. I haven't tried it for events, classes, etc., so I can't speak to that, but for this type of bookings, it's worked perfectly.
Also, every time I've needed help the support team has responded really quickly and politely. If the app didn't have the exact feature I needed, they provided me with effective workarounds.
Overall, I'm quite happy I have the unlimited license for Amelia, and will continue to use it for our clients' websites.