The ease of use for scheduling events is great! It's also easy to add new attendees or even delete them after you've already scheduled their event times (even if they have not yet confirmed).
We were able solve our ticket sales problems by using this service as well - we can now send tickets straight from Salesforce directly into spingo which makes things so much easier when it comes time for guests/attendees to confirm attendance at your upcoming functions etc., since there are no limits other than how many people attend within 24 hours. I would highly recommend trying out any free trial that may be available before purchasing anything else because honestly everything has worked flawlessly thus far once installed through my orgs SFDC account. This software helps us track RSVP data better overall in addition tracking donations via Paypal integration was very helpful too :).