We used attendize for a week full of events. Four parallel sessions, eight events per day, five days. Attendize nicely handled hundreds of page visits and over 1250 orders.
It was a bit of a pain to set up, though, one would have had to set up 8x4x5=160 events and another 160 tickets. We finally reverted to 5 events, one per day, and 160 tickets. This worked but the ics calendar now shows the full day, not the booked time slot.
It may be useful to consider